The Best Sleep Sacks, Tested by Parents and Approved by Babies

Better sleep for baby (and mom)

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Published Mar 15, 2024

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Meet the Expert

Navya Mysore, MD is a primary care provider at One Medical based in Brooklyn, NY. She completed her family medicine residency and maternal child health fellowship at McGill University and is certified by the American Board of Family Medicine and the College of Family Physicians of Canada.

How We Chose the Best Sleep Sacks

There are a lot of sleep sacks out there! To narrow down the list, we interviewed parents, vetted reviews and tried sleep sacks firsthand to bring you our top picks. Features we were looking for included: comfort, safety, ease-of-use and affordability.

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What to Consider When Buying a Sleep Sack

Fit: Use size charts to make sure your baby’s sleep sack fits properly. While some sleep sacks are more form-fitting than others, a general rule of thumb is that no sleep sack should ever be so baggy that it bunches up near your child’s face, which can be dangerous. You especially want sleep sacks to fit snug when Baby is tiny and can’t roll over or pull fabric away from their own face.

Safety: "You want to make sure that the baby is safe and comfortable," says Dr. Mysore. While you don’t want too much bagginess around a child’s face, you do want space for their legs to move. Specifically, you want to ensure that there’s enough room for babies to frog-leg their hips wide open—an important movement for their development. You also want to ensure that the sleep sack is free from choking or strangulation hazards, like loose ribbons, bows or buttons.

Fabric: "You want to make sure that the material is breathable and doesn't allow for the baby to overheat with the sleep sack on overnight," says Dr. Mysore. "Look for fabrics that are soft to the touch on both the exterior and interior of the garment. Cotton and cotton blends are great for softness. For colder climates in the winter a wool/cotton blend can be good for warmth."

TOGs: When browsing sleep sacks, you may see something called a “TOG” rating. TOG, or Thermal Overall Grade, tells you how much insulation a sleep sack provides. Lower TOG ratings, like 0.5 are lighter weight and better for warmer temperatures. Higher TOG ratings, like 2.5, are best for super cold temps. Reference a reliable TOG rating chart if you’re unsure of which weight is best for your child’s nursery.

Paige Doepke Liwanag

Freelance Writer

Paige Doepke Liwanag lives in Chicago and has been working as a freelance writer since 2016 and writing fashion, beauty and home commerce content for PureWow since 2021. She's a bit of a jack of all trades when it comes to subject expertise. She's written about everything from how to create the perfect resume to choosing the right cleaning method for your tile grout (yep, you read that correctly). When she's not writing, you can find her snuggled up to her pitbull, Clementine and her baby boy, Nathan.

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