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 and height to find the most appropriate and safe size for them.
Imperial Size Chart
| ergoPouch Size
(same as size) |
Pouch Length (inch) | Sleeve length (inch) | Child weight (lb) | Child Height (inch) |
|---|---|---|---|---|
| 3-12M* (000-1y) |
31.5" | 11" | 13-26lb | 24.4 - 33.1" |
| 8-24M (00-2y) |
35.4" | 12.6" | 18-31lb | 26.8 - 36.2" |
| 2-4Y | 41.3" | 14.2" | Follow height markers | 36.2 - 42.5" |
| 4-6Y | 47.2" | 16.9" | Follow height markers | 42.5 - 47.2" |
| 6-8Y | 53.1" | 19.7" | Follow height markers | 47.2 - 51.2" |
*Previously size 2-12 month
Metric Size Chart
| ergoPouch Size
(same as size) |
Pouch Length (cm) | Sleeve length (cm) | Child weight (kg) | Child Height (cm) |
|---|---|---|---|---|
| 3-12M* (000-1y) |
80cm | 28cm | 6-12kg | 62-84cm |
| 8-24M (00-2y) |
90cm | 32cm | 8-14kg | 68-92cm |
| 2-4Y | 105cm | 36cm | Follow height markers | 92-108cm |
| 4-6Y | 120cm | 43cm | Follow height markers | 108-120cm |
| 6-8Y | 135cm | 50cm | Follow height markers | 120 - 130cm |
*Previously size 2-12 months
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.
- Free delivery on orders over $70*
- Estimated dispatch: 19 February 2026
- 30-day returns and exchanges
- Almas C.Verified Buyer1/21/26ReviewingSleep Suit Sack 1.0 TOG DragonfliesRated 5 out of 5 starsSleep sack
It works well for my 1.5yo I was trying to transition out of night nursing to independent sleeping. He runs hot and likes to move around so this worked well for him and he tolerated it decently relatively quickly.
- Brooke A.Verified Buyer12/19/25ReviewingSleep Suit Sack 1.0 TOG WillowRated 5 out of 5 starsSleep Suit Bag 1.0 TOG Willow
Incredible quality, durable, and cute, like all of the Ergo products!
- Jess M.Verified Buyer12/9/25ReviewingSleep Suit Sack 1.0 TOG DragonfliesRated 5 out of 5 starsLove our new sleep bag
Our previous bags were getting a touch small and bubs didn’t have much wiggle room, the new bags are great!
