Sleep Sacks
Sleep Sacks & Wearable Blankets for Safer Baby Sleep
A sleep sack is the simplest swap a new parent can make: out goes the loose blanket, in comes a wearable bag your baby cannot kick off, ride up over the face, or wriggle out of at 3 a.m. Our sleep sack and swaddle collection focuses on the brands pediatric sleep consultants actually name, in the TOG weights and sizes that match real nursery temperatures from newborn through toddler.
What's in the Collection
- Newborn swaddles with arms-in, arms-out, or transitional wings for the 0 to 3 month stage
- Classic wearable blankets in sleeveless designs that pair over footed pajamas
- Weighted-feel sleep sacks for older babies who startle easily
- Organic cotton, bamboo, and merino fabrications across 0.5, 1.0, 2.5, and 3.5 TOG ratings
- Two-way bottom zippers for diaper changes without fully undressing your baby
How to Pick the Right TOG
TOG is a thermal rating, the higher the number, the warmer the sack. As a working guide:
- 0.5 TOG: nurseries 74 to 78°F, summer, travel
- 1.0 TOG: year-round at 69 to 74°F, the most versatile pick
- 2.5 TOG: cooler rooms at 61 to 68°F, fall and winter
- 3.5 TOG: cold nurseries below 61°F or drafty older homes
Dress your baby in a short-sleeve bodysuit under a 1.0 TOG, add footed pajamas under a 2.5, and skip the layer entirely under a 0.5 in warm weather. Always check the back of the neck for warmth, not the hands.
Swaddle vs. Sleep Sack: When to Switch
Swaddles are for the newborn stage before your baby shows signs of rolling, usually around 8 to 12 weeks. The moment you see those first roll attempts, transition to an arms-out sleep sack. Many of the swaddles in this collection are designed exactly for that handoff, with removable wings or arm holes that convert without buying a second product.
Built Around the Safe Sleep Basics
Every sleep sack here meets the AAP safe sleep guidelines: no loose blankets, no hoods, no ties, fitted at the neck and armholes, roomy through the hips to support healthy joint development. Look for the hip-healthy designation from the International Hip Dysplasia Institute on the product pages, it's a detail worth checking.
Pair your sleep sack with a firm crib mattress and breathable fitted sheets from our crib mattress collection, and round out the nursery with rocking and feeding setups from our motorized nursery gliders. Building a full registry? Start with baby gear essentials for the first year.
FAQ
What's the difference between a swaddle and a sleep sack?
A swaddle wraps the arms in to mimic the womb and calms the startle reflex in newborns. A sleep sack leaves arms free and is used once your baby can roll, typically from around 8 weeks onward.
When should I stop swaddling my baby?
Stop swaddling at the first signs of rolling, usually between 8 and 12 weeks. Move to an arms-out wearable blanket so your baby can reposition safely.
What TOG sleep sack do I need year-round?
A 1.0 TOG covers most nurseries between 69 and 74°F. Keep a 0.5 TOG for summer and a 2.5 TOG for winter, and adjust the layer underneath rather than buying multiples of every weight.
Can my baby sleep in just a sleep sack?
Yes, in warm rooms a 0.5 TOG sleep sack over a short-sleeve bodysuit, or even a diaper alone, is appropriate. Use the chart on each product page to match the room temperature to the right combination.
Are sleep sacks safe for newborns?
Yes. Sleep sacks are the AAP-recommended alternative to loose blankets and are considered safe from day one in the correct size and TOG.