Winter Weight Sleep Bags

Keep your infant cozy and safe with our quilted winter sleep sack collection, designed to provide duvet-like warmth without the risk of loose bedding. Consistently rated the best winter sleep sack for cold nurseries, our winter sleep sack baby designs feature patented shoulder snaps to ensure undisturbed slumber all night long.

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baby deedee sleep nest travel gray skies
baby deedee sleep nest travel gray skies

Sleep Nest Travel

From $35.19

Color
baby deedee sleep nest moonlight sun
Sleep Nest Original

Sleep Nest Original

From $32.99

baby deedee sleep nest gray bubblegum
baby deedee sleep nest teddy gray bubblegum

Sleep Nest Teddy

From $26.39

Color
baby deedee sleep nest tee lucky trunks
Sleep Nest Tee

Sleep Nest Tee

From $32.99

The Ultimate Winter Sleep Sack Collection

Wrap your child in the warmth of a duvet without the risk of loose bedding. We have transformed the comfort of a heavy quilt into a line of wearable sleepwear designed specifically for cold nights. Our selection guarantees a restful night's sleep for the whole family, featuring our signature quilted winter sleep sack designs that keep your infant cozy and secure from bedtime until morning.

Why Our Winter Sleep Sack is The Best Fit

Your baby should have a sleep environment that is both warm and safe. Our winter sleep sack baby collection serves as a wearable duvet, giving your infant continuous warmth without the suffocation dangers associated with loose blankets. Frequently voted the best winter sleep sack by parents, our Sleep Nest Original features a patented shoulder-snap design and premium reverse zippers, making midnight diaper changes easy and quick without exposing your baby to the cold air.

The Move to a Winter Walker

Our winter sleeping jumper, made especially for toddlers who are beginning to stand, crawl, and walk, is the perfect upgrade for active children. This creative design, often called a "Sleep Kicker," features the same plush, quilted fabric as our sacks but adds ankle cuffs. It provides the same high level of warmth as a conventional winter sleep sack but removes the trip hazard, allowing energetic toddlers to move safely around their crib or bedroom while staying toasty warm.

Sleepwear for Cold Weather

Whether you have a drafty nursery or simply live in a colder climate, maintaining body temperature is key to good sleep. We provide specific TOG values for our fabrics so you can dress your newborn with confidence. Our world-famous quilted design offers a 2.5 TOG rating, making it the ideal solution for winter nurseries (64-70°F) where a standard cotton sack just isn't enough to keep the chill away.

Frequently Asked Questions

When should I switch from a sleep sack to a sleeping jumper?

It is important to think about transitioning a baby to a baby sleep jumper (or our Winter Sleep Kicker) once your baby starts to pull up to a standing position or walks. Since a winter sleep sack is just right for a crib-bound baby, it is important to note that a jumper has holes on its legs that enable toddlers to move about in cribs without tripping.

What should my baby wear underneath a winter sleep sack?

What you put underneath will depend upon the room temperature you are in, as well as the TOG of your sack. For a typical 2.5 TOG winter sleep sack baby design, you will usually put a long-sleeve bodysuit or footed PJs underneath. This sack is meant to be your baby’s sole blanket, so layer appropriately to keep them warm without overheating.

Are baby sleeping jumpers safe for walking?

Yes. Our winter baby sleeping jumper, made especially for toddlers who are beginning to stand, crawl, and walk, is perfect for active explorers. This creative design has ankle cuffs that let your child safely and freely move around their crib or bedroom. It provides the same level of warmth as a conventional winter sleep sack but removes the trip hazard.

Why use a wearable blanket instead of a regular blanket?

The loose blankets inside the crib might be dangerous in cases of probable suffocation or entrapment. A winter sleep sack eliminates these hazards by ensuring the "duvet" stays securely on your baby, keeping their face clear. The baby cannot kick the covers off either, so this keeps them warm and sleeping soundly through cold nights.

How do I choose the right size?

Sizing is based on weight and height, but most importantly, not just based on age. A proper fit is very important for safety: the neck hole needs to be snug enough that your baby's head cannot slip down inside. Whether choosing the best winter sleep sack or a jumper, always refer to our size chart to ensure a secure and comfortable fit.