A sleep sack, also known as a wearable blanket, is a soft, cozy garment designed to keep infants and toddlers warm and safe during sleep. Unlike traditional loose blankets that may pose a suffocation risk, sleep sacks are worn like sleeveless sleeping bags with armholes and zippers—ensuring your baby stays covered all night without overheating. The softest sleep sacks are crafted from gentle, breathable fabrics such as organic cotton, bamboo, or fleece, making them ideal for delicate baby skin.
These wearable blankets are widely used as a safer alternative to conventional baby bedding for newborns through toddlers. Sleep sacks help babies sleep better by maintaining a consistent temperature and reducing sudden movements that can interrupt rest. They’re also a helpful part of bedtime routines, signaling that it’s time for sleep. Many models offer thoughtful features like swaddle wings for newborns or foot openings for toddlers, making them highly versatile for growing children.
Our Top Picks
After reviewing numerous options, we’ve curated a list of the best and softest sleep sacks for 2025—each chosen for its comfort, safety, and practical design to ensure peaceful nights for your little one.
HALO 100% Cotton Sleepsack Swaddle
Description: This 3-in-1 adjustable swaddle is a parent favorite for its breathable cotton and smart, secure design. It allows arms-in, arms-out, or hands-to-face swaddling, depending on your baby’s preference. With over 29,000 positive reviews and an average 4.6-star rating, it’s a trusted pick for newborns aged 0–3 months.
Burt’s Bees Baby Beekeeper Wearable Blanket
Description: Made from 100% organic cotton, this lightweight sleep sack is soft, breathable, and perfect for warmer environments. It features an easy-access zipper and comes in multiple sizes and cute prints. With a stellar 4.7-star rating from over 35,000 reviews, it’s a go-to for eco-conscious parents.
PurComfy Supersoft Sleep Sack (1.0 TOG)
Description: Made from silky-soft bamboo viscose, this sleep sack is gentle on baby’s skin and has a moderate 1.0 TOG rating, making it perfect for all-season use. The two-way zipper design makes diaper changes quick and hassle-free. It’s praised for its luxurious feel and high durability.
Hudson Baby Quilted Sleep Sack
Description: This quilted cotton sleep sack is perfect for cooler nights. With long sleeves and soft, breathable fabric, it keeps your little one warm and cozy. The front zipper makes nighttime diaper changes easier, while the gender-neutral designs add charm to its functionality.
Love to Dream Swaddle UP
Description: This innovative swaddle is ideal for babies who prefer sleeping with arms up. It allows self-soothing while keeping the baby securely wrapped. Made from stretchy, soft material, it reduces the startle reflex and encourages deeper sleep. A top pick for newborn comfort and support.
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