Best Sleep Sacks
Sleep sacks are more than just adorable mini sleeping bags for your baby and toddler. Designed to help reduce the risk of SIDS, sleep sacks (also called wearable blankets or sleep bags) offer a safer alternative to loose blankets in the crib, which is a major no-go according to the American Academy of Pediatrics’ safe sleep guidelines.
From cotton, fleece and wool to newborn-friendly picks and footed options for toddlers, there’s a huge variety of sleep sacks available. We’re sharing our favorites for every age, stage and sleeping environment so you can figure out what’s best for your little one.
Best Sleep Sack Overall
Why We Love It
Easy to get on and off, affordable, washes and wears well and made from soft, comfy cotton—there’s so much to love about this HALO sleep sack. It’s the perfect choice to replace loose blankets in the crib while still giving your little one the feeling of security. There are lots of colors and sizes to choose from and an inverted zipper that opens and closes from the bottom for easy diaper changes.
Keep in Mind
Looking for a warmer option when the temperature drops? There’s a cozy microfleece option. Need something that adjusts to a range of temperatres? We like Halo’s Ideal Temp Wearable Blanket.
Best Organic Sleep Sack
Why We Love It
If organic cotton is important to you, then this wearable blanket from Burt’s Bees Baby makes a great choice. The fabric is soft and lightweight, yet still warm, and there’s plenty of room in the lower half for your little one to kick and move their legs around freely.
Keep in Mind
This sleep sack is made from 100% GOTS-certified organic cotton.
Best Newborn Sleep Sack
Why We Love It
Part sleep sack + part swaddle, this creative hybrid is a great option for babies who may not like the tightness of a traditional swaddle blanket but aren’t quite ready for a sleep sack. The Swaddle UP lets your little one sleep with their arms up, a natural position that also gives them access to their hands for self-soothing. It’s soft and breathable, easy to use and, it must be said, makes every baby look even cuter than normal while using it.
Keep in Mind
Unlike traditional arms-out sleep sacks that can be used well into toddlerhood, you’ll need to ditch this one when baby starts rolling over independently.
Softest Sleep Sack
Why We Love It
Made from breathable material and ethically sourced from sustainable bamboo, this sleep sack is not only gentle on your little one—it’s also gentle on the planet. Parents rave about how soft and comfortable it is. (And they’re right!) We also love the beautiful color choices.
Keep in Mind
Wondering what TOG stands for? Thermal Overall Grade, which indicates how much heat the fabric retains.
Best Sleep Sack for Winter
Why We Love It
If you live in a place where the winters get chilly (or you’re just trying to cut down on those heating bills), then you’re going to need an extra-warm sleep sack to keep your little one toasty warm. Made with thick, stretchy organic cotton and with a TOG of 2.5, this wearable blanket is like a tiny (but safe) luxury comforter made with your baby in mind. Its only downfall is it doesn’t come in adult sizes.
Keep in Mind
This sleep sack is designed for rooms 63-73°F.
Best Lightweight Sleep Sack
Why We Love It
For just the opposite—a lightweight sleep sack just right for warmer climates—check out Crane Baby’s line of (beautiful) cotton sleep bags. They’re made from 100% cotton muslin that we swear gets softer after each and every wash. It’s a good choice for keeping your baby cozy in a warmer climate without the risk of overheating.
Keep in Mind
This sleep sack will work from birth until your baby is about nine months old. For those early days, there’s an adjustable underarm snap to help the sleep sack fit more snugly on your baby’s tiny body.
Best Swaddle Transition Sleep Sack
Why We Love It
This sleep suit may turn your little one into the Stay Puft Marshmallow Man, but we promise it’s worth the laughs. Many babies have trouble transitioning from the snugness and security of a traditional swaddle to the roominess of a sleep sack. The Merlin offers the perfect middle ground. It’s light enough to allow baby some freedom of movement, but heavy enough to quell the startle reflex, helping many babies sleep longer and sounder.
Keep in Mind
There are two important things to remember when using the Merlin. First, it’s warm. Skip the heavy PJs underneath and instead dress baby in a short-sleeved bodysuit. Second, it’s not safe to use once your little one starts rolling over, so be sure to transition to an arms-out sleep sack once your little one reaches that milestone.
Best Sleep Sack Swaddle
Why We Love It
For a swaddle that goes the distance with an arms in or out option, the HALO SleepSack Swaddle is a popular choice. It features foolproof Velcro wings that make it easy to wrap around and swaddle younger babies who need more security, then adjusts to an arms-out style for older babies who are beginning to roll over or for little ones who just aren’t digging the tighter swaddle. It’s made from mid-weight cotton so it’s suitable for a variety of different temperatures.
Keep in Mind
Parents’ biggest gripe? Undoing the Velcro makes a pretty loud noise that can startle or wake baby.
Best Wool Sleep Sack
Why We Love It
Wool is the ideal four-season material. It’s warm in winter, cool in summer and naturally regulates your body temperature. This sleep sack, made from Merino wool, will keep your little one at just the right temperature all year round. It’s machine washable and comes in an adjustable universal size that works for kids from two months to two years.
Keep in Mind
Definitely the most expensive sleep sack on our list, we realize the Woolino is a bit of an investment, but we think it’s worth it since it can be used all year long.
Best Sleep Sack for Toddlers
Why We Love It
Is your toddler on the move? Although you can certainly use traditional sleep sacks well into toddlerhood, some parents prefer the added mobility that a footed sleep sack provides. This one features a two-in-one design that converts from a traditional sleep sack to a sleep suit using four-way zippers. It works best for rooms 70-75°F.
Keep in Mind
If you have a crib climber on your hands, a footed sleep sack may not be the best choice. Stick with a traditional sleep sack that will sabotage those crib breakout attempts rather than a footed style that may make them easier.
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