Sleep Suit Sack 3.5 TOG Willow
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.
| 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 |
| 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 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.
See full size guide for all products
- Free delivery on orders over $70*
- Estimated dispatch: 18 June 2026
- 30-day returns and exchanges
- Laura G.Verified Buyer6/8/26ReviewingSleep Suit Bag 3.5 TOG Bon AppetitRated 5 out of 5 starsBest sleeping bag ever!
I tried different sleeping bags and Ergopouch is definitely the GOAT! Quality, design, durability and comfort. I feel so happy to see how my bub can sleep warm and safe in it.
- Sabrina S. L.Verified Buyer6/1/26ReviewingSleep Suit Bag 3.5 TOG Bon AppetitRated 3 out of 5 starsWarm but my 15m old is a mover
Nice and warm for bub but my 15m old is a mover and we had the jersey for the 1 tog. She was used to the stretch so we’re still getting used to this one. She moves a lot in her sleep and gets frustrated when she can’t move as easily which wakes her up
- Jo G.Verified Buyer5/24/26ReviewingSleep Suit Sack 2.5 TOG SageRated 3 out of 5 starsWeird cotton
The product says 100% cotton but it feels different to the ones o got previously - more silky.
