Sleep Sack 3.5 TOG Sleeved Dragonflies
Baby and toddler sleep sack designed for arms-out sleepers (usually from around 3 months of age).
Size Guide
Sleep Sack (formerly Jersey Sleep Sack)
Imperial Size Chart
| ergoPouch Size
(same as size) |
Pouch Length (inch) | Child Weight (lb) | Child Height (inch) |
|---|---|---|---|
| 3-12M (000-1y) |
31.5" | 13 - 22lb | 24.4 - 29.9" |
| 8-24M (00-2y) |
35.4" | 18-31lb | 26.8 - 36.2" |
| 2-4Y | 41.3" | Follow Height Markers | 36.2 - 42.5" |
Metric Size Chart
| ergoPouch Size
(same as size) |
Pouch Length (cm) | Child Weight (kg) | Child Height (cm) |
|---|---|---|---|
| 3-12M (000-1y) |
80cm | 6-10kg | 62-76cm |
| 8-24M (00-2y) |
90cm | 8-14kg | 68-92cm |
| 2-4Y | 105cm | Follow Height Markers | 92-108cm |
Our Sleep Sack is a baby and toddler sleeping bag designed for arms-out sleepers (usually from around 3 months of age). The Sleep Sack has a slim-fit, stretchy design similar to that of a swaddle and is recommended as baby's 'first sleep sack' after the swaddling phase is over. Please use your child's weight and height to find the most appropriate and safe size for them. A sleep sack should be well fitted around the neck and the armholes to avoid your baby slipping through. It should also be bell shaped in the bottom to allow for easy leg movement. Please do not size up to the next size until your child meets the weight requirement, for safety reasons.
- Free delivery on orders over $70*
- Estimated dispatch: 10 May 2026
- 30-day returns and exchanges
- Laura M.Verified Buyer5/1/26ReviewingSleep Sack 2.5 TOG DaisiesRated 5 out of 5 starsWorth it
Beautiful sleeping bag. So soft and washes well. Worth the money and gives piece of mind it's made of breathable fabric on gentle skin!
- Kimberley D.Verified Buyer4/30/26ReviewingSleep Sack 2.5 TOG Elephant ParadeRated 5 out of 5 starsLovely sleep sack
Easy to wash and dry. Material feels very soft and comfy. Easy to zip baby in and out (no poppers!). Gorgeous design too- love it.
- Daniele B.Verified Buyer4/29/26ReviewingSleep Sack 3.5 TOG Sleeved Oatmeal MarleRated 5 out of 5 starsMy baby is now sleeping 4 hour stretches!
My baby was up every hour before purchasing. Now sleeping 4 hour stretches! This momma cannot be more thankful!
