The 8 Best Sleep Sacks To Keep Babies Safe And Cozy All Night Long

Forbes

23-06-2025

I consider myself some what of a sleep sack connoisseur after putting all three of my kids in sleep sacks for years and testing out various brands and styles. I've found the best sleep sacks are soft, cozy and safe. When picking one out, look for the appropriate size and thermal overall grade (TOG) rating, which refers to how warm the sleep sack is. Our top pick for the best sleep sack is the Kyte Baby Sleep Bag —it's made of super soft bamboo fabric that parents rave about and is available in three different TOG ratings, helping you find an option that's appropriate for the temperature of your home.
The best sleep sacks are soft and cozy, helping babies (and parents) get peaceful rest. Illustration: Forbes / Photos: Retailers
For babies under 12 months who can't yet sleep with blankets due to the American Academy of Pediatrics (AAP) safe sleep standards, a sleep sack—sometimes referred to as a wearable blanket—is a good alternative. 'The enclosed feeling of a sleep sack can mimic the womb, providing a sense of comfort and security that can help babies feel more settled and sleep better,' says Dr. Daniel Ganjian, pediatrician at Providence Saint John's Health Center in Santa Monica, California. Other top picks include the Halo Baby Sleep Sack Swaddle , which transitions from a swaddle to a sleep sack, and the super lightweight Aden + Anais Muslin Baby Sleeping Bag , ideal for warmer months.
Kyte Baby Kyte Baby Sleep Bag
Material: 97% bamboo rayon, 3% spandex | TOG: .5, 1, 2.5 | Sizes: XS to XL | Colors: 50+ | Certifications: Oeko-Tex Standard 100
The ultra-soft and cozy Kyte Baby Sleep Bag, made from bamboo fabric, is popular among parents—and it comes recommended by Ganjian as well. With temperature-regulating, breathable fabric, this sleep sack has all the makings of a good night's rest for your little one. You can unzip it from the top or the bottom, and the 'zipper garage' keeps it from rubbing against your child's skin. It also zips up around the side, so it won't bother your child's tummy if they're old enough to roll over onto their belly overnight. For safe sleep, it's important to always place your baby down on their back, but if they can already roll both ways and end up on their tummy, it's okay to leave them.
In addition to the quality functional design, the aesthetics of this sleep sack are great, too. It's available in over 50 colors and designs including limited edition and seasonal options. Though your baby might not yet appreciate a cute Barbie or Harry Potter print, it can help bring some joy to you while you're changing a midnight diaper or tucking in a sweetly sleeping baby.
Material: 100% organic cotton (.5 TOG), 100% organic cotton shell, 100% poly-fill (1.5 TOG) | TOG: .5, 1.5 | Sizes: S to XL | Colors: 20 | Certifications: Global Organic Textile Standard (GOTS) cotton
I've used plenty of Burt's Bees Baby Beekeeper Wearable Blankets over the years, and they remain one of my favorites. Ganjian also recommends them thanks to their affordability and availability. I used the .5 TOG with my kids and found the fabric to be soft and lightweight. Each sleep sack is made of organic cotton, which is part of what makes these affordably-priced sleep sacks such a value.
A two-way zipper makes middle of the night diaper changes simple, and the zipper is covered at the top to prevent it from irritating your baby's skin. I handed a few of these sleep sacks down from one child to the next and they continued to be high quality without any holes or major signs of wear.
Material: Merino wool lining, organic cotton outer | TOG: None (temperature-regulating fabric) | Sizes: One size fits 2 to 24 months | Colors: 23 | Certifications: Oeko-Tex Standard 100, Woolmark and RWS certified merino wool, GOTS certified organic cotton
Recommended by Ganjian, the Woolino 4 Season Sleep Sack is worth the splurge for a good reason: adjustable snaps around the arms create a universal size that grows with your child from 2 months up to 2 years. Additionally, the merino wool fabric is temperature regulating, to keep baby comfortable in room temperatures between 63 and 75 degrees Fahrenheit, meaning you won't need to switch between various sleep sacks from one season to the next. It's also available in a variety of soothing colors and prints, including night sky and teddy bear.
To get the sleep sack on and off, use the snaps at the shoulders and the two-way zipper. The versatile zipper also makes diaper changes easy, and zipper pull guards help protect your baby's skin. For extra support and temperature safety, each purchase also comes with a nursery thermometer and dressing guide.
Amazon Halo Baby Sleep Sack Swaddle Ideal Temp
Material: Polyester-rayon blend | TOG: 1.5 | Sizes: Newborn, Small | Colors: 4 | Certifications: Design recognized as hip-healthy by the International Hip Dysplasia Institute
All of my babies were given a Halo Baby Sleep Sack Swaddle at the hospital when they were born and it quickly became our go-to swaddle and sleep sack for newborns. When using it as a swaddle before babies are able to roll, the hook and loop closure makes it incredibly easy to use. Then, when they're ready to transition to using it as a sleep sack with their arms out, you can still softly secure the hook and loop closure with their arms out to create a snug feeling.
Though Halo has many sleep sack and swaddle options, this particular one is made of their special 'Ideal Temp' fabric to help regulate your baby's body temperature by absorbing heat when they're warm and releasing heat when they're cold. The brand notes that the fabric on this swaddle is slightly more stretchy than other Halo swaddles, so it might fit a bit larger than other Halo swaddles. It has a double zipper so you can just zip up from the bottom for convenient nighttime diaper changes, while zipper covers help prevent it from bothering your baby's skin.
Amazon Love To Dream Swaddle Up Transition Bag
Material: 93% cotton, 7% elastane | TOG: .2, 1, 1.5 | Sizes: M to L | Colors: 10 | Certifications: Design recognized as hip-healthy by the International Hip Dysplasia Institute
The Love To Dream Swaddle Up Transition Bag helps babies transition from swaddling to sleeping in a sleep sack by maintaining that snug feeling infants love. For young infants who are not yet rolling and can still safely be swaddled, it keeps their arms in a snug up position. You can remove the arms once they're able to roll and can no longer safely be swaddled. The sleep sack has a twin zipper, making nighttime diaper changes simple. It also has a zipper cover to help protect your baby's skin.
When I used this swaddle with my babies, I found the fabric to be thin yet soft and flexible. Some babies sleep better with their arms up, so this type of swaddling is definitely worth trying if your baby isn't yet rolling. This is also a good choice for parents and caregivers to try if their baby tends to break out of their swaddle.
Amazon Aden And Anais Muslin Baby Sleeping Bag
Material: 100% organic cotton muslin | TOG: 1 | Sizes: 0 to 6 months, 6 to 12 months, 12 to 18 months, 18 to 36 months | Colors: 14 | Certifications: None
My babies tend to be hot sleepers, so I like the lightweight feel and breathability of the Aden And Anais Muslin Baby Sleeping Bag. The fabric is nice and soft, and I was able to hand them down from one baby to the next. They're made of 100% organic muslin cotton, which is a very breathable and loosely woven fabric.
The sleep sack opens from the bottom, so you can quickly change a nighttime diaper and put them back to bed. It's available in a variety of muted and whimsical colors and prints, making it a beautiful addition to your baby's nursery. It's worth noting that some reviewers have trouble with the zipper, though I never had any issues with mine when I used these sleep sacks. 'We live in a place where the summers are often triple-digits, and both my summer babies lived in these super lightweight sleep sacks their first few months,' says Forbes editor Esther Carlstone. 'They're easy to get on and off and can be tossed in the washer to clean.'
Loulou Lollipop Loulou Lollipop Tencel Sleep Bag 2.5 TOG
Material: 94% Tencel lyocell, 6% spandex or 68% Tencel lyocell, 26% organic cotton, 6% spandex | TOG: 2.5 | Sizes: 0 to 6 months, 6 to 18 months, 18 to 36 months | Colors: 5 | Certifications: Oeko-Tex Standard 100
If you keep your home on the cool side or need something warmer for winter, a 2.5 TOG sleep sack like the Loulou Lollipop Tencel Sleep Bag is a great choice. It's specifically designed to keep babies comfortable in rooms between 61 and 68 degrees Fahrenheit. It also has a two-way zipper that wraps around the side of the sack, making diaper changes easy and preventing the zipper from bothering your baby's belly if they roll onto it while they're sleeping. Just remember to always place babies on their back when you set them down for sleep. The zipper also has a cover at the top to prevent irritation.
While there are only currently five patterns available, they're all precious, including an 'All Aboard' print that features trains and a cozy forest print. In addition to the soft outer fabric, Dupont Sorona insulation helps keep your baby warm.
Amazon Kyte Baby Sleep Bag Walker
Material: 97% rayon made from bamboo, 3% spandex (exterior), 100% polyester (filling) | TOG: 1 | Sizes: M to XL | Colors: 43 | Certifications: Oeko-Tex Standard 100
'Many toddlers continue to use [sleep sacks] for comfort and warmth, especially if they kick off blankets,' says Ganjian. This was certainly the case for all three of my kids, who wore sleep sacks well into toddlerhood. The Kyte Baby Sleep Bag Walker has leg holes with ankle cuffs so your toddler doesn't get tripped up trying to walk in a traditional sleep sack. Because toddlers grow at a slower rate than babies and they might stay in the same size for longer, I like that this option is so high-quality and durable.
It has a dual zipper, which is helpful if your toddler is still having overnight diaper changes or needs to use the toilet in the middle of the night. There's also a zipper cover to help protect your baby's skin. There are 43 colors and patterns available, including limited edition and seasonal prints.
At Forbes Vetted, the baby and kids gear team spends countless hours testing and researching products. We also regularly speak to experts in the baby and kids gear industry and pediatric experts such as sleep consultants and pediatricians.
We chose the best sleep sacks based on a combination of experience, research and expert insight. We considered our own experience using sleep sacks with our babies and toddlers. Betz has used the Burt's Bees Baby Beekeeper Wearable Blanket , Halo Baby Sleep Sack Swaddle , Love To Dream Swaddle Up and Aden + Anais Muslin Baby Sleeping Bag sleep sacks with her kids.
, , and sleep sacks with her kids. We compared features of different sleep sack options, including materials, TOG ratings and zipper function.
Especially for sleep sacks we haven't used ourselves, we considered customer reviews and only included options with an overall star rating of at least four out of five stars.
We included sleep sacks for a variety of different needs and purposes, including a value choice, options for different seasons and ones for different ages. What To Look For In The Best Sleep Sacks TOG Rating
TOG stands for thermal overall grade. 'This indicates the warmth of the sleep sack. Choose a TOG rating appropriate for your home's temperature and the season. Higher TOG ratings are for colder rooms, lower for warmer,' says Ganjian. Typical TOG ratings for sleep sacks range from .2 to 2.5.
Recommendations for TOG ratings, sleepwear and room temperature can vary from one sleep sack brand to the next. It's important to consider the specific recommendations of the brand you choose. However, this chart serves as a general guideline for TOG rating and room temperature.
Choose the appropriately-rated sleep sack, and consider what your baby will be wearing under their sleep sack as well. For warm rooms, your baby may only need a onesie and a lower TOG sleep sack, while babies sleeping in a colder room might need long-sleeve pajamas and a higher TOG sleep sack. Ganjian also cautions that overheating is a risk. 'Signs of overheating include sweating, damp hair, flushed cheeks and rapid breathing,' he says. Fit And Sizing
The right fit and sizing helps ensure your baby is safe and can't wiggle out of their sleep sack at night. 'Ensure the sleep sack is the correct size for your baby's weight and height. It should be snug enough around the chest and neck to prevent the baby from slipping down inside, but allow plenty of room for leg movement,' says Ganjian.
Though it can sometimes be tempting to buy the next size up so your baby can grow into a product, this can be unsafe with sleep sacks. Ganjian warns parents to 'never use a sleep sack that is too big, as the baby could slip down into it." Material
You want your baby's sleep sack to be soft, cozy and breathable. 'Look for breathable, soft fabrics like cotton, organic cotton, bamboo or muslin. Some sleep sacks also come in fleece for colder environments,' says Ganjian. Ease Of Use
Some sleep sacks are easier to get on and off than others, and when you're trying to change a baby or toddler in the middle of the night, ease of use is incredibly important. 'A two-way zipper can be very convenient for diaper changes, as you don't have to fully remove the sleep sack. Look for zippers with protectors to prevent irritation,' says Ganjian.
What Sleep Sacks Are The Best?
The best sleep sacks fit your baby well and keep them comfortable while they're sleeping. Our top pick is the Kyte Baby Sleep Bag because it's made of soft, high-quality material, it's durable and it's available in a variety of sizes, TOG ratings and colors.
Do Pediatricians Recommend Sleep Sacks?
Many pediatricians recommend sleep sacks. 'They provide a safe alternative to loose blankets, which can pose a suffocation hazard for infants,' says Ganjian. The AAP also recommends sleep sacks (wearable blankets) for parents who are worried about their baby getting cold at night.
Which Is Better Halo Or Kyte Sleep Sack?
The Kyte Sleep Sack is better than the Halo because it's so soft and durable. However, the Halo sleep sack is a good option, too. We recommend the Halo Sleep Sack Swaddle as the top pick for newborns because of its ability to transition from a swaddle to a sleep sack.