Sleep Suit Sack 3.5 TOG Dragonflies
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: 09 May 2026
- 30-day returns and exchanges
- Lea E.Verified Buyer5/5/26ReviewingSleep Suit Sack 2.5 TOG DaisiesRated 5 out of 5 starsWonderful sleepsuit
My daughter only sleeps well in this! The sleeves are perfect for mobility while keeping her warm, and I sleep with peace of mind that she’s not warmed by plastic. 10/10! I would ask for different neutral prints, in beige tones.
- Rachel W.Verified Buyer5/3/26ReviewingSleep Suit Sack 2.5 TOG WillowRated 5 out of 5 starsComfortable for toddler
Our toddler loves this sleep suit and it keeps him warm when he doesn’t want to use the quilt.
- Ingrid F.Verified Buyer4/28/26ReviewingSleep Suit Sack 3.5 TOG DragonfliesRated 5 out of 5 starsMy Son Loves it!
Perfect if you spend cold nights chasing your child with a blanket.
