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Best Sleep Sacks for Baby 2021

Babies need safe sleep and the best way is with a wearable blanket, called a sleep sack, or your new best friend. With baby warm and comfy, both mom and baby can get a few extra hours of Z’s. With so many sleep sack choices, which is best for your baby?

Don’t worry, we have the scoop on infant sleep sacks and sleep sacks for toddlers to save you hours of research with all the best options for your needs right here. We did the work to help you and your little one get a good night’s rest.

Best Sleep Sack for BabyWhy It's BestRating
Love to Dream Swaddle Up Sleep SackThis sleep sack/swaddle combo has a unique hourglass shape to keep baby comforted and contained.♥♥♥♥♥
Halo Sleep Sack An inverted zipper, lots of sizes, and a history of quality make this the best sleep sack.♥♥♥♥♥
Woolino 4 Season Ultimate Baby Sleep SackThe seat belt slot and shoulder snaps make keeping warm in the car seat easy.♥♥♥♥♥
Burt's Bees Baby Wearable Blanket SackA 100% organic cotton sleep sack that zips up from the bottom.♥♥♥♥♥
Halo Early Walker Sleep SackIf your kiddo is walking during the first year, the leg openings in this sleep sack are perfect.♥♥♥♥♥
Hudson Baby Long-Sleeve Wearable Sleep SackFor colder months or nights, this long-sleeve sleep sack keeps baby warm and protects from scratching.♥♥♥♥♥

The Best Sleep Sack to Help Baby Sleep Comfortably

Love to Dream Swaddle Up Sleep Sack

Best Sleep Sack/Swaddle Combo

Image of the Love To Dream Swaddle UP Original 1.0 TOG, Gray, Small, 8-13 lbs.

The Love to Dream Swaddle Up sleep sack will provide the perfect conditions for your little love to sleep through the night. Designed for a baby’s natural sleep positions, both mom and baby will get a full night’s rest. The TOG rating is 1.0 and is for babies weighing between 5 pounds and 18.5 pounds.

What I Love

  • Tapered fit at the waist gives your little a swaddled feel without adding bulk
  • Shape of the arms allows baby to hold their arms up in a preferred position
  • Two-way zipper makes changing baby’s diaper a breeze
  • Wide foot space
  • Five colors and multiple sizes
  • Unique shape helps reduce startle reflex for some babies
  • More expensive than Halo but not scary

What I Do Not Love

  • Neck area can be a bit tight
  • Fabric is thinner than expected and probably better suited for summer or warmer nights

Alternative: The Love to Dream Nuzzlin Sleep Sack is a great alternative for those mama’s wanting a more traditional shape.

Halo Sleep Sack

Best Overall Value 

HALO Sleepsack 100% Cotton Wearable Blanket, Baby Blue, Large


Halo Sleep Sack is the first name to come to mind when you think of a wearable blanket because they have been making them longer and better than other companies. Today, Halo still offers quality sleep sacks to keep baby snoozing through the night. The TOG rating is 1.0 and it is best for babies who weigh 5 pounds to 36 pounds.

What I Love

  • Zipper unzips from the bottom
  • Sizes range from preemie to extra-large
  • No sleeves prevent overheating
  • Embroidered right on the front is the phrase “Back is Best” to show Halo’s commitment to helping prevent SIDS
  • Roomy to give baby room to move their chunky thighs but still small enough to keep them cozy
  • Great price

What I Do Not Love

  • Zipper can break or be uncooperative 
  • Size runs large

Alternative: Halo also has a Swaddle Sleep Sack for babies who need tighter spaces to feel comfortable.

Woolino Season Ultimate Baby Sleep Sack

Best Sleep Sack for the Car

Image of the Woolino 4 Season Ultimate Baby Sleep Bag Sack - 2-24 Months Universal Size - Merino Wool - Gray


The Woolino Season Ultimate Baby Sleep Sack comes with a hefty price but offers a ton of features. The only reason this one is farther down the list is the exorbitant price but if you have the money, this is the sleep sack for your baby! It might be time to ask grandma for a little help! It is best for children ages 2 months to 2 years.

What I Love

  • Features a seatbelt slot
  • Tagless
  • Shoulder snaps help get baby into sleep sack
  • Multiple sizes and colors to choose from
  • Long shape for plenty of room
  • Helps regulate baby’s temperature 

What I Do Not Love

  • Higher price but features are worth it 

Alternative: Woolino also makes a Cotton Organic Sleep Sack for naturally-conscious mamas.

Burt’s Bees Baby Wearable Blanket Sack

Best 100% Organic Sleep Sack

Burt's Bees Baby Beekeeper Wearable Blanket, 100% Organic Cotton, A Bee C Cloud (Large)

For an organic baby sleep sack choice, the Burt’s Bees Baby Wearable Blanket Sack is your best bet. The Burt’s Bees sack is available in sizes small, medium, and large and you can choose from over 10 designs.

What I Love

  • 100% Organic Cotton
  • Climate Pledge Friendly
  • Zipper opens from the bottom for easy diaper changes
  • Super soft
  • Great for sensitive skin

What I Do Not Love

  • Zipper could have a flaw

Halo Early Walker SleepSack

Best for Walkers

Image of the HALO Early Walker SleepSack Micro Fleece Wearable Blanket, Blue, Large

Halo created a sleep sack for every need including for Early Walkers. Keep your toddler warm and cozy but still able to get out of bed safely. With multiple sizes and colors keeping baby comfy has never been easier. The TOG rating is 1.0 and it is best for babies weighing 5 pounds to 36 pounds.

What I Love

  • Feet can be tucked in the bag or out for walking
  • Sizes medium to extra-large
  • No sleeves prevent overheating
  • Embroidered on the front is “Back is Best” to show Halo’s commitment to helping prevent SIDS
  • Price is almost too good to be true

What I Do Not Love

  • Runs large
  • Zipper may break or become uncooperative

Hudson Baby Long-Sleeve Wearable Sack

Best Sleep Sack with Long Sleeves

Hudson Baby unisex baby Cotton Long-Sleeve Sleeping Bag, Sack, Wearable Blanket, Elephant, 0-3 Month US

The Hudson Baby Long-Sleeve Wearable Sack was designed for colder weather and nights. The long sleeves feature built-in scratch mittens for protection and they help to keep your tiny tot’s hands warm. You can choose between size 0-3 months or 3-9 months.

What I Love

  • Long-sleeved design 
  • Features built-in scratch mittens
  • Good price
  • Features zipper protector
  • Lots of designs to choose from

What I Do Not Love

  • Sizes only accommodate up to 9 months

Alternative: For a baby sleep sack with removable sleeves, try the OuYun Baby Organic Sleep Sack.


See all the best infant car seat options.

aden + anais Classic Sleep Sack

Best Summer Sleep Sack

HALO 100% Cotton Muslin Sleepsack Wearable Blanket, Gator Plaid, Medium

This thin cotton sleep sack is a perfect choice for summer, or for babies who run hot. The aden by aden + anais Classic Sleep Sack comes in 3 sizes and a bunch of colors, so you can get it in lots of cute styles for any age. The thin cotton muslin allows for maximum breathability while still keeping baby cozy. This infant sleep sack has a TOG of 1.0 and is for babies weighing between 10 pounds and 28 pounds.

What I Love

  • 100% cotton muslin
  • Sizes range across the first 18 months of baby’s life
  • No sleeves so the sack stays light and breezy and gives baby free range of motion
  • Double-layered to keep baby warm enough
  • Zips from the bottom up

What I Do Not Love

  • Improper zipper alignment
  • Potential faulty zipper

Alternative: Because Halo has a sleep sack for every occasion, they also make a thinner, muslin sleep sack. It comes in lots of colors and patterns and has slightly better quality. The thing to note here is that the Halo 100% Cotton Muslin Sleep Sack is only 0.5 TOG, so it’s even thinner than the Aden + Anais summer sleep sack.

Disney Dumbo Wearable Blanket

Best Character Sleep Sack

Image of the Disney Dumbo Wearable Blanket, Grey, Medium

The Disney Dumbo Wearable Blanket brings adorable to a new level, at least for Disney fans. Pick from Minnie Mouse, Dumbo, or Simba themed wearable blankets to keep your adorable bundle bundled adorably! The price is nice too, the perfect pick for your baby or a gift. It is designed for babies weighing between 7 pounds and 22 pounds.

What I Love

  • Disney design!
  • Affordable price

What I Do Not Love

  • Zipper isn’t the best
  • Legroom is shorter than some other baby sacks

Touched by Nature Organic Baby Sleep Sack

Second Best Organic Baby Sleep Sack

Touched by Nature Baby Organic Cotton Sleeveless Wearable Sleeping Bag, Sack, Blanket, Birch Tree, 6-12 Months

Another great 100% organic cotton option is the Touched by Nature Organic Baby Sleep Sack. It is lightweight so it’s great for the summer months or warmer nights. You can choose from a huge list of designs, it’s awesome! The TOG is 0.5 and sizes range from 0 months to 24 months. 

What I Love

  • Lightweight material (for warm nights)
  • 100% Organic Cotton
  • HUGE list of designs 

What I Do Not Love

  • Price depends on size and design

TILLYOU Breathable Cotton Baby Wearable Blanket

Best Baby Sleep Sack with 2-way Zipper

TILLYOU Large L Breathable Cotton Baby Wearable Blanket with 2-Way Zipper, Super Soft Lightweight 2-Pack Sleeveless Sleep Bag Sack Clothes for Boys, Fits Toddlers Age 12-18 Months, Gray Crown

The TILLYOU Breathable Cotton Baby Wearable Blanket features a convenient and practical 2-way zipper design. This design allows you to zip down from the top or zip up from the bottom which is super handy. This has a TOG of 0.5 and it comes in sizes small to extra-large.

What I Love

  • 2-way zipper design
  • Sleeveless so baby doesn’t get too hot and can move around freely
  • 100% Natural Premium Cotton
  • Features zipper protectors
  • Each purchase includes 2 sleep sacks

What I Do Not Love

  • Only 4 designs to choose from

Guide to Selecting a Baby Sleep Sack

Baby sleepsacks were invented to prevent babies from having loose blankets that could be a hazard. Here are a few key aspects to keep in mind:

Foot Room

Some babies love lots of legroom while others prefer confined spaces. Pick a blanket that best suits your baby’s needs.

Ease of Diaper Change

Diaper changes are inevitable. Pick a wearable blanket that makes this chore easier on both mom and baby. Also, opt for a great night time diaper so that you have to do those middle-of-the-night changes less frequently.

Comfortable Fabric

Most baby fabrics are soft and comfy but always check for breathability and softness as baby’s best night of sleep will not happen if they are covered in scratchy fabric.


Most zippers nowadays are cheap and unreliable… find one that seems sturdy if possible. Also, keep in mind if the zipper is near the baby’s delicate chin. A cover for the zipper is better.

Neck Hole

The neck hole needs to be large enough to allow breathing room but not so large it slumps or falls off baby’s neck and onto their shoulders.

TOG Rating

TOG stands for ‘Thermal Overall Grade’ and refers to the unit of measurement for textiles and warmth. Choose the TOG rating that best suits your house temperature and how warm or cold your baby tends to be.

FAQ’s about Sleep Sacks for Babies

Are baby sleep sacks safe for tummy sleepers?

Tummy sleeping isn’t safe for any baby until they can roll over on their own. Always put the baby to rest on their back and if they roll over they should be fine.

What should I put on my baby under the sleep sack?

Depending on the weather, put them in an onesie or a bodysuit. Try to avoid fleece or heavy fabrics when putting them in the blanket as you do not want the baby to overheat.

Should I get a thick or thin baby sleep sack?

Pick a sack thickness based on your house temperature (don’t forget the nursery heater!), local temperature, your baby’s natural temperature, and preferences. Try a couple of different thicknesses until you find the one that works for your baby.

Is it okay to use a bigger size baby sleep sack, or do I need to buy one size per age?

Try to get a size that fits your baby’s neck and shoulders well so it doesn’t scrunch or cause issues such as bunching near the baby’s face or mouth. Then look at length to make sure they have enough room to move and kick without a lot of extra bottom fabric (which will become a baby toy, I promise you…they will find it and play with it!).

Can I use a blanket instead of a baby sleep sack? 

Blankets are not safe for babies when unattended as they do not move well enough if a blanket gets too close to their mouths. Sleep sacks are a safe alternative to a blanket.

Can I wash the baby sleep sack?

Yes. Always wash the sleep sack before putting baby in it for the night. Feel free to try it on baby before washing so you can still return the sack if you need to but will know if it fits properly.

Our Favorite

The Love to Dream Swaddle Up Sleep Sack is the perfect combination of fit and comfort for most babies. They have cornered the market with a safe, comfortable, and affordable baby sleep sack to help you and your baby sleep through the night.

Adrina Palmer
Adrina Palmer

Adrina Palmer is a stay-at-home-mom to three wonderful children and a wife to an amazing husband. She has a bachelors degree in Religion from Liberty University and works as a blogger, copywriter, and reviewer. Adrina is a Christian hoping to help other stay-at-home moms find the joy and simplicity as a mother and wife. In her free time she enjoys many crafts, writing, spending time with family, and reading. She would love to hear from you!

2 thoughts on “Best Sleep Sacks for Baby 2021”

  1. Woolino is ultimate primarily because it’s made with premium Australian merino wool, which works like a natural AC, keeping baby warm when it’s cold and cool when it’s warm.


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