Best Sleep Sack for Newborns and Infants in 2020 (Top 10 Reviews)

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When the baby sleeps better, you sleep better too. However, that’s unlikely with loose blankets that are known to twist and interfere with your baby’s breathing!

The best sleep sack for newborns and infants will work the magic as these products are tested to keep your bundle of joy snug, comfy and safe every day and night of every season and climate.

We have baby sleeping sacks that are designed for every age and stage, but if you have a newborn or infant, then this resourceful guide will be very handy.

Best Sleeping Sacks for Infants and Newborns

Key Features

Our Rating

Material is polar fleece. Breathable. Inverted zipper

Cotton. Womb-like. Velcro closure to snuggle hands

Cotton. TOG of 5. Roomy. Inverted zipper

Double cotton layers. Front zipper. Zipper protector

Double cotton layers. Sleeveless. Great inverted zipper

Double cotton layers. Shoulder straps. Sturdy zipper. Zipper protector

Cotton. Sturdy zipper. Snap tab zipper pull cover. Lifetime guarantee

Cotton. Round neck. 2-packs in each box. Strong zipper. Zipper lining

Bamboo and cotton. Thick but lightweight. 2-way zipper. Adjustable shoulder snaps

Cotton. 2-adjustable flaps. Inverted zipper. Roomy. Adjustable 3-Ways

Best Sleep Sack for Newborns and Infants (Top Sleep Sack Reviews)

1. Baby Deedee Fleece Sleeping Bag

Best Baby Sleep Sack for Winter

This sleep sack is made from 100% polar fleece and is made in variety of sizes to cater for babies who are between 0 and 36 months.

The cocoon-like sack is soft, breathable and comforting to keep your baby restful the entire night. It is a great addition to moms with an aggressive air conditioner or parents who reside in a cold dominant region but want to keep their baby warm and comfortable all night long.

Baby Deedee Fleece Sleeping Bag is the best warmest sleep sack for older babies when compared to others we've reviewed.

Another thing we love is the inverted zipper for your baby’s safety and the snapped shoulder straps that make putting on and off a bit easier. We also loved that the sleeping bag is machine washable and easy to dry on low heat.

Things We Liked

  • Shoulder buttons makes wearing the sack a breeze
  • The sleep sack is lightweight
  • Available in variety of sizes

Things We Didn't Like

  • Too roomy to some users

2. Swaddle Me Original Swaddle

Swaddle Me Original Swaddle is 100% breathable cotton for a hot summer night or daytime nap. The soft material creates a womb-like cozy feeling to prevent startle reflex that would wake up your sleeping infant so your baby will have a comfortable sleep.

It's made with an adjustable infant wrap that contains a hook and loop to make swaddling a breeze and for a perfect fit.

Our favorite part is how the swaddle keeps the baby snuggled and the Velcro closure that resists the breakout of arms that is common to some babies. 

This way, you’ll be able to contain your baby’s arms within the swaddle but you can place their arms out once your angel is grown as that would interfere with how they sleep.

There is also a soft tab to affix the Velcro so they don’t attach to anything when you’re laundering. The Velcro is also strong and will not frail with use.

Things We Liked

  • The material is breathable
  • Using is easy
  • Soft fabric that is not bulky

Things We Didn't Like

  • A little expensive to some users

3. Halo Sleepsack 100% Cotton

Best Sleep Sack For 6-Month Old

The sleeping sack has a TOG rating of 5 to offer comfort for summer and can be layered with warmer sleepwear for winter.

Made from 100% cotton, this sack is breathable and should take the place of loose crib blankets that are known to affect your baby’s breathing.

We suggest this sleeping sack because it is roomy for free hip and leg movements and that’s why it is recognized by International Hip Dysplasia as it allows for healthy hip growth in newborns and infants from the start.

We love the inverted zipper that opens from the bottom for easy diapering. Plus, there are no sleeves to reduce the chances of overheating on warmer nights. The arms and neck openings are also sized for a safe fit.

Halo sleepsack 100% cotton is made in custom sizes so we have the best sleep sacks for babies who are between 6 and 12 months or between 26 and 30 inches long.

Things We Liked

  • The fabric is soft
  • Roomy and not restrictive to your baby’s legs
  • Zipper opens from bottom for easy diaper changing

Things We Didn't Like

  • Some are made with plastic zippers instead of metal

4. Touched by Nature Baby Organic Sleeping Bag

Best Sleep Sack for Summer

The summer sleep sack is made from 100% organic cotton that is soft and comfortable for your baby’s skin. It weighs light and is breathable so your baby will not get overheated in summer or spring.

We love the front zipper that zips from top to bottom to secure your baby inside the bag, plus it also makes diaper changing a breeze even in darkness.

You’ll love the zipper protector that prevents your baby from zipper scratches or irritation when they’re sleeping. The garment matches with other baby’s cloths, plus the entire print is adorable, fun and can make a perfect gift to new moms.

Things We Liked

  • The sleeping is soft to touch
  • Top to bottom zipper for easy diaper change
  • Roomy to transition with your baby

Things We Didn't Like

  • It may be difficult to get the zipper started

5. Hudson Baby Sleeping Bag

Hudson Baby Sleeping Bag is another perfect choice for your sleeping infant. Like Touched by Nature, this one is also soft and is made with 100% cotton to be soft and breathable for your sleeping baby.

This sleeping bag is made without sleeves plus it contains an inverted zipper to make dressing and diaper changing a lot easier. The zipper is great and won’t break off when you want to close the sack.

Because the sleeping bag is made with double cottons layers, it is the best sleep sack for winter, perfect if you want to keep your angel warm on a cool night.

The garment is washable and is made in different sizes to cater for babies who are between 0 and 24 months. Plus, there are variety of colors and patterns that gender-neutral style and gender specific garments to choose from.

Things We Liked

  • Strong zipper
  • Lightweight and breathable fabric
  • Thick for cool nights

Things We Didn't Like

  • Zipper goes from bottom to top which is awkward to some users

6. Baby Deedee Sleep Nest Lite Baby Sleeping Bag

This wearable blanket is ideal to babies who are between 0 and 36 months. The breathable 100% cotton baby sleeper is made with two layers to be comfortable for a peaceful night.

It is easy to put on the sack because there are clever shoulder straps that can be unsnapped so there is no need to remove the whole sack. The snaps are not flimsy and will not come lose.

There is also a sturdy zipper, but this one is very appropriate when you need to change the diaper. The zipper is made with a fabric behind it and so it has zero chances of irritating the baby’s skin.

These wearer blankets are made to suit every season and climate and you can choose from fleece mid-weight to quilted weights and cotton lighter-weights. It's roomy to grow with your baby. Plus, it is not bulky and feels like a T-shirts sewn together. It is also washable and easy to dry.

Things We Liked

  • Easy to put on
  • Roomy but not bulky
  • It’s made with two layers to keep the baby warm in winter

Things We Didn't Like

  • Colors not interesting to some users

7. Burt’s bees baby wearable blanket

Burt’s Bees Baby Wearable Blanket is 100% cotton and that means it is soft and comfortable for your baby’s skin. Cotton fabrics are typically breathable so the sleeping bag will not overheat in summer.

The cotton construction is GOTS certified so it is safe and will not cause irritation to babies with sensitive skin.

You’ll love the strong zipper and a snap tab zipper pull cover for your baby’s security. Plus, the zipper opens from bottom to make diaper changing late at night a breeze.

This sleeping bag is thoughtfully made to be sized for the baby to freely move around without discomfort. It's high-quality, washable and comes with a lifetime guarantee.

Things We Liked

  • Roomy for your baby’s growth
  • The zipper is heavy duty
  • Cotton is soft and breathable

Things We Didn't Like

  • The sizing is too large to some users

8. Ely’s & Co Wearable Blanket Baby Sleep Bag

Ely’s & Co sleep bag is made with a round neck that has a soft tab on the front to keep your baby cozy and relaxed all night long.

The 100% natural cotton sleep sack is the softest, plus it is light in weight and breathable to prevent the sleep sack from getting hot in summer. This fabric is easy to wash and maintain.

Each box comes with two packs: one sack is charming light grey and the other one is patterned with grey and white stars. However, if you want a gender specific style, there are other sets that are made in different colors and styles for your specific need.

The wearable sack is made to be safe and contains a strong zipper for quick diaper changing and for the security of your baby. The zipper is made with a lining so it doesn’t irritate the sensitive skin.

The design is cozy and creates a secure environment for your angel by eliminating unnecessary risks associated with lose blankets that twists or tangle to cover your baby’s face.

Things We Liked

  • The package comes in two packs
  • Zipper goes up for easy diapering
  • Roomy for your baby’s growth

Things We Didn't Like

  • The zipper gets stuck a lot according to some users

9. Nested Bean Zen Sack Premier 

Best Sleep Sack for 3 Month Old

This premier wearer is made from a blend of bamboo and cotton and that means the sack is breathable for summer days and a hot daytime nap.

The fabric is thick yet lightweight to feel like your arms. It is also lightly weighted on the chest region to simulate your gentle touch.

Nested Bean Zen Sack Premier is made with a two-way zipper to make diaper changing at mid-night a lot easier. There are also adjustable shoulder snaps that makes the sack roomy as the baby grows. 

Like other sleeping sacks we’ve reviewed, this one is also available in different sizes perfect to babies who are between 0 and 15 months. 

The material is washable and does not contain harmful chemicals like BPA and phthalate and exceeds safety standards as set out by legal bodies. It is adorable and perfect to fussy sleepers.

Things We Liked

  • Light in weight
  • Breathable for summer climates
  • Adjustable shoulder snaps for your baby’s growth

Things We Didn't Like

  • It’s a bit pricey

10. Halo Sleep Sack Swaddle

This Halo wearable blanket is a great choice if you want to replace those loose blankets that twist to cover your baby’s face. You can choose between sacks that are made with lateral flaps or those without. 

Made from breathable 100% cotton, this wearer is made in custom sizes and styles for babies who are between 13 and 18 lbs. There are also two adjustable flaps that immobilize the arms to prevent startle reflex in babies for the first few months. 

The inverted zipper allows for fast diaper changing in darkness and for the safety of your baby when they sleep. The cotton sleep sack is adjustable in 3 ways and adapts to your baby’s style of sleep for easy transition from swaddling to sleepsuits.

It is roomy for free hip movements to prevent hip dysplasia and that’s why these wearer blankets are trusted by hospitals as they help babies to have a safe sleep from the start.

Things We Liked

  • Roomy for free hip and leg movement
  • The fabric is soft
  • Dual zipper for easy diaper changing

Things We Didn't Like

  • May get tight below the arms

How to Choose the Best Baby Sleep Sack

There are lots of sleep sacks and knowing what features to look when shopping can be overwhelming. The following are important features that characterize the best sleep sacks for babies in market stores.

Breathable fabric

Natural or organic cotton is the most breathable when compared to other constructions. Cotton is also hypoallergenic and will not cause irritation to the sensitive skin. For summer climates, cotton does not heat up.

However, you may opt for polar fleece like Baby Deedee Fleece Sleeping Bag or flannel as this material is typically warm for winter climates.  Unfortunately, do not go for fleece if the baby is less than six months after birth. Avoid any other synthetic material as it may not go well with your baby’s skin.

Strong Zippers with Liners

Some sleeping sacks are made with metallic zippers, while others are plastic. A sturdy zipper is made from metals and should not stuck at some sections. The zipper should run from top to bottom for easy diaper changing late at night.

The fabric lining or protector on the zipper is vital because it acts as a barrier to shield the zipper from scratching the skin to cause irritation.

Snapped Shoulder Straps

Snapped shoulder straps makes putting on and off a lot easier so there no need to remove the whole sack when changing the diaper.

As the baby grows, the adjustable shoulder snaps are adjusted to make the baby sleeping sack roomy for the growing baby.

The best baby sleep bag should contain Velcro closure to contain your baby’s hands; and multiple ways to adjust the wearer to adapt the baby’s style of sleep for a seamless transition into sleepsuits.


Because babies are of different size and age, choosing the right size for your baby will be very crucial. A too small sleep sack is uncomfortable and may pose development problems.

Again, a too big sleep sack may prompt the baby to escape from the swaddle aside from posing an SIDS risk like the loose blankets.

Look at the dimensions or the sleep sack sizing chart to confirm the right size for your angel.

Why You Need A Sleep Sack


Sleep sacks are made to be womb-like and imitates the same environment as a mom’s wombs. Because a sleeping sack is an alternative to swaddles blankets, it keeps the baby warm while allowing for free hip and leg movements.

However, the baby sleeping blanket may be uncomfortable as your baby grows as the swaddle blanket may be too restrictive for the active baby.


Swaddle blankets are made to replace loose blankets and stuffed animals that are unsafe to newborns and infants. Also, they reduce suffocation risk as they do not allow newborns to turn back at night and impede their breathing.

Sleep sacks do not immobilize the baby’s hips and arms and therefore do not interfere with their development to negate the potential of Hip Dysplasia.

How to Swaddle a Baby with Sleepsack

Wrapping Up

There are lots of sleeper bags for babies in market stores that are available in a variety of styles and colors. However, in our opinion, Swaddle Me Original Swaddle is the best sleep sack for newborns and infants. The sleep sack is womb-like and creates a cozy feeling.

Swaddle Me Original Swaddle has the most unique features when compared to other baby sleeping blankets we’ve reviewed. First off, this one is made with a hook and loop for custom fit and easy swaddling.

The best part is the Velcro closure that prevents the baby’s arms from getting out at night. It cradles the baby and prevent them from turning at night to reduce suffocation risk.

Overall, this is an exceptional sleep bag and is definitely a classic choice to consider!