The Sleep Suit sack is an award-winning, multi-functional sleep sack and Sleep Suit with legs in one, for babies, toddlers and kids.
Size Guide
Sleep Suit Sack
Please use your child's weight to find the most appropriate and safe size for them. The Sleep Suit Sack should be fitted around the neck and the armholes to avoid your child slipping through. In 'legs' mode, there should be enough length at the end of the suit to allow your child to move their feet freely. 2.5 TOG and 3.5 TOG Sleep Suit Sacks should not be used in a 5-point harness or car seat for safety reasons.
| ergoPouch size | 3-12M | 8-24M | 2-4Y | 4-6Y | 6-8Y |
|---|---|---|---|---|---|
| Same as size | 000-1y | 00-2y | 2-4y | 4-6y | 6-8y |
| Pouch length (cm/inch) | 80cm / 31.5" | 90cm / 35.4" | 105cm / 41.3" | 120cm / 47.2" | 135cm / 53.1" |
| Sleeve length (cm/inch) | 28cm / 11" | 32cm / 12.6" | 36cm / 14.2" | 43cm / 16.9" | 50cm / 19.7" |
| Child weight (kg/lb) | 6-12kg / 13-26lb | 8-14kg / 18-31lb | Follow height markers | Follow height markers | Follow height markers |
| Child height (cm/inch) | 62-84cm / 24.4 - 33.1" | 68-92cm / 26.8 - 36.2" | 92-108cm / 36.2 - 42.5" | 108-120cm / 42.5 - 47.2" | 120 - 130cm / 47.2 - 51.2" |
*Previously size 2-12 months
- Free delivery on orders over $70*
- Estimated dispatch: 11 January 2026
- Extended Holiday Returns until Jan 31st
- Monika F.Verified Buyer12/27/25ReviewingSleep Suit Sack 2.5 TOG DaisiesRated 5 out of 5 starsSleep sack
Amazing and cozy
- Sevim B.Verified Buyer12/25/25ReviewingSleep Suit Sack 3.5 TOG SageRated 1 out of 5 starsColor fading
I bought 2 ergopouch sacks, one of them 2.5 tog and the other one was 3.5. I washed and dried them according to instructions and they have never seen a sunlight but 2.5 tog one started fading and it’s spreading
- Karen M.Verified Buyer12/23/25ReviewingSleep Suit Sack 2.5 TOG DragonfliesRated 5 out of 5 starsBaby Loves it
This baby sack is perfect. My 22-month-old does not like to feel trapped/wrapped, and we bought a size 2-4 years old, and it is perfect. He sleeps all through the night and keeps him warm.
