Best Baby Sleep Sacks In 2019: Keep Them Cozy And Safe!

Sweet sleep doesn’t come by easily once the baby arrives. When you’re running on high doses of caffeine and caring for an older child or two, the last thing you’d want is a baby who wakes because her sleeping gear is uncomfortable.

We’ve all been there. Putting the baby to sleep, planning the next hour (because really, who sleeps when baby sleeps?) only to have her wake up after a measly ten minutes. It is, without exaggeration, an earth-shattering disappointment.

If you’re craving a short break or a good peaceful rest but your little one doesn’t seem to settle, start from the basics. Are they warm and comfortable in their clothing? Is baby snug enough in a way that’s still safe? Then move on to the more advanced stuff and see if that moves the needle.

Baby sleeping in a sleep sack on a bed

There fact of the matter is, there’s plenty of terms and guidelines to be familiar with when it comes to baby sleep – as well as all sorts of different items, accessories and equipment.

If, like the majority of us when we first embarked on this parenting journey, you’re clueless as to what differentiates baby sleep sacks from baby swaddles and when you’re supposed to use which, then this article is for you.

In the following sections, we’ll define what exactly baby sleep sacks are, the differences between sleep sacks and swaddle blankets, when you should use a sleep sack, why you should use them and what benefits they bring to the table, official guidelines on best practices and safe use, as well as what exactly you should look for when purchasing one.

Read on, and a good rest may very well be within reach!

But first, here’s a quick look at what we believe to be some of the best baby sleep sacks of today.

Best Baby Sleep Sacks – a Quick Look at Our Top 10 Recommendations

Note: When clicking on any of the below links, you’ll go to the product listing pages on Amazon, where you can read further information, see current prices and read customer reviews.

Best Baby Sleep Sacks – A More Detailed Look At Our Top 10 Recommendations

Check out some of the best baby sleep sack options you could wrap your little one in today!

There’s different options that suit every parent’s wants, as well as every baby’s personal preferences. There’s also different options to pick and choose from depending on which life stage you’re little one’s currently in.

Burt’s Bees Baby Wearable Blanket

Skin-to-skin is recommended for both bonding and for warmth; it’s incredible how it can instantly calm a fussy baby and offer protection and security.

I fondly recall the soft skin of my son, and how I wanted to preserve it that way for as long as possible.

I was careful to limit exposure to the wind and the sun almost to nil, but what is many times ignored is that the clothing we put on our little ones has much to do with the health and suppleness of their skin too.

Baby skin is thinner and more porous than ours. And, since babies spend a whole lot of time in sleep-wear, going for materials kind to their skin for nap and bedtime is very much recommended.

The Burt’s Bees Baby Sleepsack is made of 100% organic cotton that is not only great for sensitive skin, but also prevents overheating. Overheating increases the risks of SIDS, so this is something to definitely take note of.

Also, with the makers of this product very much aware of the laundry exigencies of babies and toddlers, this sleepsuit washes perfectly well and does not pill.

Chances are you’ll be washing this sleep sack almost every day – and having material like this that lasts for a long time to come ensures your little one will get the most out of it.

The Burt’s Bees sleep sack is also great for transitioning from snug swaddling to roomier sleep sacks. It’s spacious enough for baby not to feel constricted, yet cozy enough for them to have a lovely sleep.

It comes in several designs and features a zipper that starts at the bottom to make night time diaper changes more of a breeze, as well as prevent any unnecessary hazards with a zipper that’s otherwise very close to your little one’s face.

The zippers are also well-guarded to prevent chafing baby’s delicate skin.


  • Easy to use size chart to get the best size possible. Keep in mind that an appropriately sized sleep sack is a must.
  • Intelligently-made arm and head openings to prevent baby from slipping inside the sack.


  • Sometimes, it might feel like a certain degree of skill is needed to get the zipper to close properly. This can sometimes be a downside, especially during night time diaper changes when keeping eyes open is already too much of an effort.

Click to Check Price on Amazon

Halo Micro Fleece Sleep Sack

Babies love the tight warmth of a swaddle.

After three trimesters safely snug in the womb, the outside world can come as quite a shock. Plenty of babies don’t take too well to being in a large space, and this often translates to sleepless nights.

Been there, done that! Sleepless nights, day in and day out take a massive toll on already-exhausted parents.

The Halo Micro Fleece sleep sack is a perfect combination of swaddle and sleep sack that can grow with your baby as their sleeping habits also change.

It has two wear options, and can be used either as a swaddle or a sleep sack.

Using this, you can also swaddle your little one in three ways: with arms in, hands to face for self-soothing or one or both arms outside for more space exploration.

The Halo Sleepsack offers the snug feel of a swaddle, but leaves ample space for the legs.

It’s useless having a sleep sack with various wear options if the size won’t last your baby long, and the Halo Sleepsack also takes care of this. The size is adjustable, thanks to the foldable flaps on each side which you can adjust as your baby grows.

Rest assured that this a great piece of baby gear: it’s the number one choice for many hospitals nationwide. This certainly says a lot in terms of functionality and safety.

On the subject of safety, it was an unfortunate event that led to the creation of Halo. The makers of this swaddle, unfortunately, lost their first born to SIDS. The Halo Sleepsack was thus made for safer sleep for all.

To raise awareness on SIDS as well as prevent it from happening to anyone else’s little bundle of joy, Halo states that they donate a part of proceeds from each sale to organizations working on this front. How’s that for corporate social responsibility?

If your baby is already showing signs of rolling over, then this sleep sack might not the best option for them. Usually, swaddling should be discontinued once your baby starts rolling over.


  • Ideal for newborns weighing 6 lbs and over.
  • Roomy design that does not restrict the hips and legs.
  • Ideal for colder seasons.


  • Fleece can get too warm at times, so be sure to monitor the room temperature as well as dress your baby appropriately.
  • Not the best option for taller babies.

Click to Check Price on Amazon

Nested Bean Zen Classic Sack

Ever notice how babies simply adore having a warm hand on their chest?

My son still pulls my hand and rests it on his tiny chest to soothe and sleep. It’s the cutest thing ever, but admittedly, I can’t always sacrifice my arm for a whole nap or night!

This is where the Nested Bean Zen Classic Sack scores full points.

Let’s discuss one of its nifty features first for a second. This sleep sack comes with a weighted center to mimic touch, helping the baby feel more secure.

The chest area of the sack has a weighted pad developed with the help of physiotherapists to provide the best amount of reassuring pressure.

Babies can sleep so much better thanks to this little trick! It’s a definite life saver for many tired parents. Hello sweet sleep, you’ve been terribly missed!

This sleep sack is best for three months onwards, but can also be used for newborns, as long as they weigh over 3kg. It’s washer friendly and, more importantly, dryer safe, so washing and drying in the same day is possible.

The sack features a two-way zipper to make both diaper changes and dressing up easier.

It’s one of the few sleep sacks on the market today that you can dress your little one in using only one hand. If you’re a multitasker like I am, this is a win.

It basically opens like a book: place the baby and simply zip up, and you’re all good to go. The straps are also adjustable, so your growing munchkin can get more wear out of it.


  • 100% cotton.
  • Ideal for transitioning from a swaddle.


  • Not that warm, so it might not be an ideal option for you if using in colder temperatures.

Click to Check Price on Amazon

Hudson Baby Long-Sleeve Sleepsack

A comfortable baby is one who sleeps longer. I never delved into the science behind it, but this was undoubtedly proven to be true when it came to my kids.

Four months in, it definitely resonated with my son. It’s only once we met his unique sleeping needs that he started sleeping through the night.

Moral of the story: Keep baby comfortable so you stay comfortable too!

Cold winters and cool air-conditioning in summer can both affect your little one. Sometimes, a sleeveless sleep sack is not enough to keep your munchkin nice and warm.

The Hudson Baby sleep sacks feature long sleeves for warmth and functionality.

And, on the functionality front, they also have another thing going for them. You can save some hard-earned cash and buy in packs.

While we don’t recommend going immediately for a multiples pack, if you try one or two and your little one loves them, a four-pack might come in very handy.

Also, chances are that you’ll be washing the sleep sack daily – be it a blowout or river-like dribble, the sleep sack will find itself in the washer on a consistent basis.

If daily laundry is not in your books, the 4-pack option of the Hudson Baby Long-Sleeve sleep sack can be a lifesaver.

The sleep sack features built-in scratch mittens to prevent your little one from scratching themselves, as well as unnecessary waking up. This is a functional feature that regular sleeveless sleep sacks don’t have, so is a huge plus for many parents.


  • Zipper covered with a flap for safety.
  • Ideal for cooler nights.
  • Stretchy cotton.


  • Best used for 0-3 month olds only; baby will quickly outgrow them.
  • Zipper ends at neckline, which can be tricky for diaper changes.

Click to Check Price on Amazon

Luvable Friends Baby Safe Wearable Sleeping Bag

Deciding on the best night time clothing for your baby can become quite a headache at times.

Is he too warm? Is she too cold? In the first days especially, you end up breaking the whole night for baby checks at 5-minute intervals.

Little ones are too precious for words, and really no one would blame you if you’re a helicopter parent in the first months.

Prepping up on gear to make life easier? We’re definitely in! The Luvable Friends sleep sack is made out of soft muslin that allows your baby’s skin to breathe while also offering comfort and warmth.

It’s also available in jersey for those colder nights. It’s made up of two layers, so you can rest assured that your little one won’t feel cold during the night.

It has a proper thickness to keep your baby warm and enjoy some cozy sleeping, but is still lightweight.

The sleep sack features a bottom to top zipper for added safety as well as easier diaper changes. It can be used from birth, with sizes ranging up to 24 months.

This means that if they grow to love it, you can simply change the size and you’re sorted until your munchkin’s two years old.

The people at Luvable Friends know that babies go through a lot of clothing changes – for this reason, the product also comes in multiple pack options. There’s no need to eagerly wait next to the dryer or line waiting for the sleep sack to dry for night time.


  • Ideal for spring temperatures (the two layers can get quite warm for summer).


  • Sizing can sometimes be off, so be sure to read the sizing guide very carefully.
  • It seems like the neck and armholes are made on the larger side. This can sometimes pose a hazard, as older babies can easily come out of it and younger ones slide right in.

Click to Check Price on Amazon

Baby Merlin’s Magic Sleepsuit

Ever wished you could just call a genie and wish for a full night’s sleep? I know I have. Dealing with a home, older kids, and work all at once can get brutal with sleepless nights added to the parenthood concoction.

The Baby Merlin’s Magic Sleepsuit promises just that. And, based on parent feedback, it’s one sleepsuit that really makes dreams come true – literally. You get to actually sleep enough to dream.

If you’re too tired to function, this is one investment you’re going to want to make. The sleep sack is made of microfleece, with a zipper that opens from top to bottom.

It gives your little one a cozy, secure feeling, akin to swaddling. The warmth and comfort provide a womb-like environment for your little one to sleep longer and more peacefully.

It also prevents the Moro reflex, which has been inconveniently startling sleeping babies since time immemorial.

The sleep sack is made out of a jersey cotton inner layer, a soft microfleece outer layer and a layer of polyfill for a soft feel.

It can be used from three months onwards, and is recommended for back sleeping in a bare crib in a room with the right temperature.


  • A true miracle worker for babies with trouble sleeping.
  • Great transitional sleep option.
  • Weight guide for easier sizing.


  • Baby can quickly outgrow the sleep sack, and it can also become inappropriate for use once the baby starts rolling over.

Click to Check Price on Amazon

Halo Early Walker SleepSack

Your newborn will soon become an energetic toddler, eager to explore the world and excited at finding new ways to escape the crib – and their clothing.

At this point, many parents wave goodbye to the regular sleep sack and opt for something that gives the little munchkin more freedom.

The Halo Early Walker SleepSack allows for more mobility for your toddler, as well as more space in the leg area while sleeping.

You can still tuck their feet in during the night, and it’s much safer than a loose blanket which can easily present a hazard. Your little one will also sleep better, as there’s no chance of kicking blankets away and feeling cold.

This model is particularly great because you can still dress your baby or toddler in footie pajamas underneath.

And if your little one’s bedtime routine also involves a spot of playing, you can get them all ready for bed in the sleep sack, and they’ll still be able to walk around and play.

The Early Walker sleep sack is ideal for babies and toddlers aged between 6 months and two years. It’s 100% polyester and unzips from the bottom end for easier diaper changes.


  • Great sizing guide to purchase the most appropriate sleep sack.
  • Allows for mobility without your toddler tripping over.


  • Some toddlers can easily get to grips with how the sleep sack works, and can sometimes manage to escape it.
  • This option is particularly great for toddlers, but if you’re looking for something that will effectively keep your little one from escaping their crib, then this might not be the best sleep sack for you.

Click to Check Price on Amazon

Newborn Mermaid Cotton Sleepbag

My phone’s memory is currently full to the brim with photos, and I can safely deduce that only around 10 feature someone or something that’s not my kids.

Pictures of my sleeping baby can easily fill a whole department at The Met, and I’m sure I’m not the only one who feels that way!

There are a whole lot of different sleep sacks out there that you can choose from, but very few are like the Newborn Mermaid sack.

If babies weren’t cute enough already as they are, people had to go and invent this super cute sleepsuit, making photos of your sleeping baby even more of a must!

This unique sleep sack makes for a great baby shower gift, and is a lovely item to have for a first newborn shoot and subsequent milestone photos.

The Mermaid sleep sack comes with built-in mitten cuffs to keep your baby from scratching herself, and is made of soft cotton fabric.

It’s best for summer babies, for wear during spring and summer. We wouldn’t say it’s exactly ideal for colder winter months, though.

Your little one may be dressed like a mermaid, but when thrown back into real life thanks to a poo explosion, diaper changes are thankfully easy as the bottom end of the sack opens wide.


  • A unique and gorgeous take on the traditional sleep sack.
  • Is both a sleep sack and a stunning photo prop.


  • The arms can sometimes feel a bit too snug for comfort, so make sure you carefully check out all the measurements before you buy it.
  • Feels slim, so might not be the best option if you’re looking for something extra stretchy.

Click to Check Price on Amazon

Baby Deedee Sleep Nest Sleeping Sack

With a never-ending choice of baby items available at the click of a button, it’s easy to get overwhelmed.

Parenting has lost its straightforwardness, if it ever was so. Every purchase today requires a ton of research and the formulation of opinions fit for a doctoral defense.

Luckily, sometimes there’s that one product which does what it says and is functional without all the trims and frills. The Baby Deedee sleep sack is one such option.

This sleep sack has a 100% cotton exterior and super soft quilted interior for utmost coziness and a cocoon-like feel.

The size options range from a tiny 10 lb to 36 months, so if loved by your baby, you can simply change the size without going back to the research drawing board.

It features a zipper and buttoned shoulder straps and is super easy to dress baby in as it opens.

There are also no struggles to get arms through, unlike other sleep sack options that often feature snug armholes that will have you break a sweat in no time.

It’s also safe for tumble dry on low for those days where it’s wash and wear.

If you’re looking for something to prevent your toddler from escaping their crib, then this might just be the sleep sack you need to get. Once dressed, it’s straight to bed – it’s not easy to walk in.


  • Functional, no frills sleep sack that gets the job done.
  • Helps keep toddlers in bed.


  • Some toddlers can easily learn to remove the sack on their own. Adventurous kids who try hard enough can still potentially find a way to escape the sleep sack and crib.
  • Zipper ends on top and is not covered. This can sometimes chafe the skin or present a choking hazard
  • No real swaddle feeling involved, it just keeps the baby or toddler warm. This means it’s not the ideal product for newborns.

Click to Check Price on Amazon

Woolino Baby Sleep Sack

A couple of weeks into parenthood and you’ll soon realize that, for some baby gear, cheaper is rarely the best option in the long run.

True, caring and providing for a new baby can get super expensive (and really fast) – but for some items, it’s better to invest in once and for all, rather than go cheaper to get by in the timebeing and end up spending more over an extended period of time.

The Woolino Baby Sleep Sack fits in this category. It’s admittedly an ‘Ouch,’–meaning that it’s not the most budget friendly baby sleep sack out there–but it’s once and done.

For the car aficionados reading this, think of a Merino Wool sleep sack as the Lamborghini of sleep sacks.

It’s made out of coveted Australian Merino Wool, is 100% natural, soft, hypoallergenic and temperature regulating by nature.

It can be used in all four seasons and can be worn by your baby as they grow from 2 months to 2 years. So, this is one sleep sack that you’ll be getting much use out of for years to come.

How can my toddler still wear a newborn sleep sack, you may ask? Easy: The underarms feature snaps to allow for growth.

It also features double shoulder snaps for more easy dressing and a two-way zipper to make diaper changes faster.

The zipper pull is made in a way to prevent chewing, and it’s also one of the only few sleep sacks on the market today that has closable seat belt slots to make transferring from stroller to crib more straightforward.


  • Might be more expensive than other baby sleep sacks on the market when comparing at face value, but you’ll likely find that it works out cheaper in the long run – as there’s no need to buy seasonal sleeper bags in different sizes.
  • No tags means no itchiness.
  • Comes with a nursery thermometer and dressing guide to get it right every time.


  • Not the most budget friendly option out there, requires a more costly investment than other more affordable options.
  • Buying two or more to manage laundry days can prove to be a costly feat.
  • No mobility allowance when the child is awake and is older.
  • Does not come with sleeves, so might not be the best option for very cold winters.

Click to Check Price on Amazon

What Exactly Is A Baby Sleep Sack?

Sleep sacks are basically sleeping bags that cover the shoulders, containing the rest of the body snugly within the bag. The arms are placed outside the sack to prevent it from rising over the head and covering the baby’s face.

Sleep sacks are a safe substitute for swaddling blankets when the baby is too old to be swaddled. Loose fabric around a baby that’s still too young can increase the risk of Sudden Infant Death Syndrome (SIDS).

A sleep bag for babies also provides your little one with a cozy cocoon following the transition from the more womb-like swaddle.

Placing your baby in a sleep sack ensures that she retains the right temperature during the night. Sleep sacks come in various styles, with sleeveless options suitable for warmer weather and fleecy long-sleeved ones suitable for the colder months.

What all sleep sack styles have in common is the cocooning of the baby’s legs in fabric that gives the same warmth as a blanket does, without many of the risks involved.

Baby Sleep Sack Vs Baby Swaddle: What’s The Difference?

A swaddle is a large piece of fabric resembling a blanket that can be tightly wrapped around the baby, tucking in any loose ends and creating a tight womb-like environment for your precious one.

After nine months in the womb, babies need a secure space that still feels familiar, and swaddling provides them with that feeling.

Once your baby starts to roll over, though, swaddling becomes dangerous and should be stopped.

According to the National Institute of Child Health and Human Development (NICHD), if you’re swaddling your baby, it’s very important that she is placed on her back to sleep. If you think she might turn, then it’s time to switch to another sleep method.

There is no definite answer as to when you should stop swaddling your baby. The Baby Sleep Site recommends stopping swaddling when you deem is best (while, of course, sticking to general guidelines on the subject and knowing what you should keep an eye out for).

That said, the most common age at which most parents stop swaddling their babies is at around 3 to 4 months of age.

On the other hand, Riley Children’s Health warns parents not to swaddle a baby after she is 2 months old, and to switch to sleeping sacks at this age.

A sleepsack swaddle provides the warmth and comfort of a blanket without compromising on safety. It feels secure for baby and lowers the risk of SIDS and suffocation. It also keeps your baby’s legs contained.

It’s surprising to note that, as highlighted by WebMD, about one child is taken to the emergency room every hour due to a crib-related injury. A sleep sack helps prevent your little one’s legs from becoming wedged in the crib’s bars.

The American Academy of Pediatrics recommends that no soft bedding – including crib bumpers, blankets, pillows, and soft toys – are left in the crib, as well as nothing else that could obstruct your baby’s breathing or cause overheating.

It has been found that soft bedding continues to be a hazard for babies, even at four months of age or older.

If your baby is finding the transition from being swaddled to the relative freedom of a sleep sack difficult, there’s quite a few sleep sack-swaddle hybrids out there for you to choose from that could help with the change.

What’s The Evidence For Using Baby Sleep Sacks? Are They Safe?

Studies have been undertaken to analyze the safety of sleeping sacks and if these do, in fact, lower the risk of SIDS.

In a review of studies undertaken amongst English, Austrian, Mongolian and Dutch infants, the researchers sought to examine the impact of sleeping sacks on SIDS’ risk.

The Dutch study found that cotton sleeping bags reduced the risk of SIDS by 65 percent. It also found that babies who slept or napped in sleeping sacks were less likely to turn face down.

The study undertaken amongst English families also found that there was a lower SIDS risk when sleeping sacks were used. However, there were also other factors in the environment the infants were in that also helped lower SIDS risk. Therefore, it could not be definitely said that the lower risk was solely due to the sleeping sacks. Other factors may have also played a role here.

The Austrian and Mongolian studies looked into temperature more than anything else. In the Austrian study, it was found that infants in sleeping sacks stayed as warm as those in blankets. A similar result was gained from the study amongst Mongolian infants: babies in swaddles held a similar temperature as those in sleeping sacks.

The review, published in the Journal of Disease in Childhood concluded that ‘sleeping bags are as safe, if not safer than other bedding when examining SIDS as an outcome’. They also note that, for sleeping sacks to be safe, they must be:

  1. Well made
  2. Appropriately used
  3. The correct size

To ensure utmost safety, these are the main factors that you should be on the lookout for when purchasing a sleeping sack for your little one – although we will be discussing a few other factors you might want to keep an eye out for in following sections.

What Are The Benefits Of Using Sleep Sacks?

There are substantial benefits to using a sleep sack. In fact, they highly recommend sleep sacks to families with babies under a year old.

These benefits include:

  1. Unlike loose blankets, sleep sacks decrease the chances of suffocation.
  2. Babies enjoy the sense of security provided by a sleep sack. It reminds them of the warmth and coziness of the womb.
  3. Sleep sacks can still be used for swaddling – and swaddling is, in turn, an ideal method for calming a fussy baby.
  4. Since sleep sacks can prevent the startle reflex (sudden movements), there’s a higher chance that your baby will have a more restful and longer sleep.
  5. Sleep sacks help maintain the right body temperature – babies that become overheated are at a greater risk of sleep-related death.

If you don’t have a sleep sack, it’s not the end of the world. Your baby can still be warm enough in just footie pajamas. Nonetheless, if you can get a hold of a good sleep sack, you can rest more assured that your baby is safe and warm during her sleep.

Are There Any Risks Involved When Using A Baby Sleep Sack?

While baby sleep sacks offer a warn and safe sleep environment for your baby, they don’t come without their risks. They must be used properly for risks to be really mitigated.

As noted by Livestrong, if not used properly, sleep sacks can lead to overheating or the baby choking on the zipper.

Preventing Overheating

Most sleep sacks available nowadays are made of fleece or polyester, with the aim of keeping babies warm.

If you happen to have this kind of sleep sack, you only need to dress your baby lightly underneath, depending on what the temperature in the room is like.

If the room is too warm, dress your little one in light pajamas and opt for a lightweight sleep sack.

As has been highlighted above, a Dutch study found that cotton sleep sacks decrease the chances of SIDS by 65 percent.

Choose Your Sleep Sack Wisely – Less Fancy is Better

A number of parents have reported that some components of their sleep sacks posed a risk to their baby, causing injuries or posing a choking hazard.

Zippers can get caught up in baby’s teeth, and oftentimes parents report that some zippers break into several pieces and become a choking hazard. Specific brands have been recalled because of such risks.

When shopping for a sleep sack, go for a model that has no embellishments whatsoever. It might be less cute – but remember, safety first!

A sleep sack with Velcro coverings over the zipper and any other enclosure also helps prevent any zipper-related injuries.

Do Babies Really Need A Sleep Sack?

At the end of the day, the decision of whether or not to use a sleep sack comes down to personal preference. Some parents swear by them, while others opt for other sleeping gear instead.

What’s for certain is, if you’re swaddling your baby, then this should stop once she gains the ability to roll over. If the transition from swaddle to bare crib is proving too difficult for your little one (and hence less sleep for you), a sleep sack can be a lifesaver.

A sleep sack also helps your baby stay covered throughout the night. It’s imperative that you buy the sleep sack in the right size – the armholes should fit properly and not slide down. Since unlike swaddling, sleep sacks have space for legs to move freely, the risks of hip dysplasia are minimized.

Your sleep sack can also become part of your little one’s bedtime routine. It helps your baby understand that once it’s on, it’s time to sleep. This is especially the case once your baby gets used to it.

Once your little one is older and starts to attempt to venture out of her crib, a sleep sack can help prevent this. Whilst there is ample room for the legs, it’s very difficult to lift a leg up once snug in one.

As noted by Jamie, a certified Family Sleep Institute Sleep Consultant, if you’re concerned about the possibility of your baby walking or standing whilst wearing a sleep sack, opt for one with feet holes. These styles usually have a smaller leg width, preventing your little one from lifting her legs over the crib.

What Different Types Of Sleep Sacks Can I Choose From?

Nowadays, there are different kinds of sleep sacks available on the market, with each having certain features ideal for specific needs.

Sleep Sacks For Babies

Undoubtedly the most common type, sleep sacks for babies are generally a wearable blanket that cuddles your baby into a loose-fitting cocoon.

This kind of sleep sack is ideal for babies who cannot stand up on their own as of yet. Once your little one starts standing up on their own without needing your help, it’s time to transition to a toddler sleep sack.

Sleep Sacks For Toddlers

Sleep sacks for toddlers are made very similarly to baby sleep sacks, but have narrow openings for the feet.

This is mainly there to prevent your toddler from toppling over if she decides to stand up.

Sleep Sacks With Diverse Zipper Lengths

Sleep sacks come with different zipper lengths. A baby cannot really undo a zipper, but a toddler will definitely find a way.

Once your little one is older, it’s wise to choose a sleep sack with a zipper that runs the length of the sack, making it unreachable for their hands.

A Velcro fastening at the top securing the zipper ensures that your baby cannot bite onto the zipper or end up getting injured because of it.

Sleep Sack Material

This one requires some thought.

When choosing a sleep sack, carefully check if the thickness of the material is suitable for the temperature of the room where your baby will be sleeping.

Babies can easily overheat, so go for a lighter material if the room is always warm. Thick materials are more suited for winter.

Fleece is not such a good idea as sleep sack material, since your little one can easily overheat in a fleece sleep sack.

If you’re willing to splurge, Merino wool sleep sacks are suitable for all seasons, but yes, they do tend to be on the expensive side. Merino wool regulates body temperature, keeping your baby cool when it’s hot and keeping them warm when it’s cold. Another plus is that merino wool is hypoallergenic.

As far as material is concerned, cotton is usually regarded as the best all-around option. Organic cotton is even better if you manage to find a sleepsack wearable blanket made from that.

If you’re not too fond of having nasty chemicals so close to your little one every single night, organic cotton sleep sacks are a great alternative to the more commercial options available on the market. Organic cotton is also hypoallergenic, so that’s another win if you’re specifically looking for organic sleep sacks.

What To Look For When Purchasing A Sleep Sack

Since we’re here to simplify your life, here’s a list of what you should take into consideration when purchasing a sleep sack for your baby.


Opt for a plain sleep sack. It might not look as cute, but embellishments can pose a choking hazard.

This also applies to buttons, since sleep sacks that close with buttons pose a risk as these can easily come loose.

Contained Zipper

A number of cases were reported of zippers breaking or getting caught up in babies’ or toddlers’ teeth. So, choose a sleep sack with the zipper contained in a Velcro flap that’s not so easy for your little one to undo.

This also ensures that your precious won’t end up with any nasty cuts or bruises on her chin because of the zipper rubbing on her skin.

Material Thickness

There’s no one size fits all when it comes to the material thickness you should go for.

As a general rule, though, lightweight material should be opted for in summer, while thicker materials should be opted for in winter.

Nonetheless, your decision should be based on the temperature of the room where the baby sleeps. If you prefer to have a sleep sack that’s good for all seasons, consider opting for merino wool.


Models with wings for the arms are great if you want your baby’s arms to remain snug inside. This kind of sleep sack is good for younger babies who still haven’t mastered the art of turning.

The more popular vest model is ideal for older babies who know how to turn. The space available within the sack allows them to safely turn on their back again.

Ease of Use

Need we say? With all the baby gear you already have around the house, having something that’s both functional and easy to use is great.

It’s wise to stay away from sleep sacks with loud Velcro fastenings – the last thing you’d want is to alert a baby who’s finally drowsy!


A sleep sack should fit your little one perfectly well.

The arms should not be loose in a way that your baby can wriggle out and risk becoming entangled in the sack. On the other hand, a small sack will be uncomfortable and can also lead to developmental issues.

Most brands have size charts to help you choose the best for your little one. If you’re in a store and unsure which size would be best, ask for assistance.

What To Avoid When Choosing A Sleep Sack

In short, here’s a list of some of the most common stuff you should avoid – and in some cases, run away from –when choosing a sleep sack for your baby:

  1. Buttons as fasteners
  2. Bows, ribbons, appliques and any other embellishments
  3. Exposed zippers
  4. Short zippers on toddler sleep slacks
  5. Fleece
  6. Synthetic materials
  7. Loud Velcro fastenings
  8. Sleep sacks that are too small or too large for your baby

How Many Sleep Sacks Will My Baby Need?

We guess you’ve realized by now: there’s no limit to how large the laundry pile can grow with a little human in the house!

To give you an example of what we’re talking about, the Good Housekeeping Institute recommends washing your pajamas every three days – and this advice should also hold for your baby’s sleepwear.

Nonetheless, it’s wise to take into consideration any pee or poo explosions which may have you running for the washing machine earlier than that.

As a matter of fact, many parents actually note that they end up washing their baby’s sleep sack every day. You have to consider drying time too when deciding whether to opt for a second or third sleep sack.

Generally, two sleep sacks at any given time should do the job well: one to use and one to wash. A third would be a perk to have, as you never know what could happen … However, generally speaking, two should be enough.

At What Age Should A Baby Stop Using A Sleep Sack?

Sleep sacks come in sizes also fit for toddlers, keeping little ones of all ages comfortable and safe. Nonetheless, there’s no chance of stopping time, and babies do tend to grow pretty fast!

Once your little one’s feet no longer fit in the largest sleep sack size available, it’s time to think of other alternatives.

With time, more parents are opting to use sleep sacks well into their child’s toddler years. What you must keep in mind is, though, is that toddlers who get too warm during the night are more susceptible to night terrors and nightmares.

If you’re using a sleep sack for your toddler, make sure they’re just warm enough, but not too warm.

As with most parenting decisions, deciding when to stop using a sleep sack also greatly depends on your own child and what you see. After all, you know your child best! If you think your little one is no longer comfortable in a sleep sack, look for alternatives that work better for her.

The Low Down On Sleep Sacks

When needed, sleep sacks can be a much safer alternative to swaddle blankets, assuming they’re properly used.

Not only have they been found to reduce the risk of SIDS when compared to other sleeping gear, but you can also sleep well knowing that your baby will remain snug all night long.

As we’ve covered in this article, not all sleep sacks are created equally, and there’s no one size fits all solution to all babies out there.

Instead, there are various factors to consider when shopping for a sleep sack. These, as well as following safe sleep guidelines issued by reputable agencies, ensure that your little one is getting the best sleep possible while staying as safe as possible.

Last but not least, you can also get some well-deserved rest!


Product photos: ©

Leave a Comment