The best sleep sacks for babies
A sleep sack is a wearable blanket: warmth with nothing loose in the crib. The two things that matter are TOG, which is how warm it is, and the fit at the neck and arms. We tested these through real nights.
Tested through real nights. Match the TOG rating to your room temperature, and check the neck is snug so it cannot ride up.
The shortlist, compared
HALO SleepSack Wearable Blanket
HALO
- Price
- $24.99
- Rating
- 4.7
Pros
- Affordable and stocked everywhere
- Inverted zipper for diaper changes
- Holds up to repeated washing
Cons
- Fewer TOG options than Kyte Baby
Kyte Baby Sleep Bag
Kyte Baby
- Price
- $49.99
- Rating
- 4.8
Pros
- Very soft bamboo-blend fabric
- TOG clearly printed on the label
- Two-way zipper for night changes
Cons
- Expensive
- Sizes sell out fast
Why this is our pick
The HALO SleepSack is the one most parents reach for: widely sized, easy to find in the right TOG, and about half the price of the premium option. Kyte Baby is worth the extra for its bamboo fabric if your baby runs warm or has sensitive skin.
Common questions
What TOG rating do I need?
Roughly: 0.5 TOG for a warm room above 24C, 1.0 TOG for a typical 20 to 24C room, and 2.5 TOG for a cold room below 20C.
When can a baby start using a sleep sack?
From birth, in the right size. A newborn-size sack with a snug neck is a safe alternative to a swaddle from day one.
Sleep sack or a blanket?
A sleep sack. Loose blankets are not recommended in the crib in the first year; a sack keeps the baby warm without one.