Sleep Onesie 3.5 TOG Oatmeal Marle
The Sleep Onesie is a TOG-rated sleeping bag alternative, designed to be worn on its own during sleep or with a Layer/PJs underneath for warmth and comfort.
Size Guide
Sleep Onesie
Please use your child's weight and height to find the most appropriate and safe size for them.
Metric Size Chart
| ergoPouch Size
(same as size) |
Pouch Length (cm) | Chest width (cm) | Child Height (cm) |
|---|---|---|---|
| 6-12M (0-1y) |
74cm | 27.5cm | 68-84cm |
| 12-24M (1-2y) |
84cm | 30.5cm | 76-92cm |
| 2-3Y | 88cm | 32cm | 92-100cm |
| 4-5Y | 98cm | 35cm | 108-115cm |
| 6-8Y | 110cm | 38cm | 120-130cm |
| 8-10Y | 120cm | 40cm | 130-140cm |
| 10-12Y | 130cm | 42cm | 140-150cm |
Imperial Size Chart
| ergoPouch Size
(same as size) |
Pouch Length (inch) | Chest width (inch) | Child Height (inch) |
|---|---|---|---|
| 6-12M (0-1y) |
29.1" | 10.8" | 26.8 - 33.1" |
| 12-24M (1-2y) |
33.1" | 12" | 29.9 - 36.2" |
| 2-3Y | 34.6" | 12.6" | 36.2 - 39.4" |
| 4-5Y | 38.6" | 13.8" | 42.5 - 45.3" |
| 6-8Y | 43.3" | 15" | 47.2 - 51.2" |
| 8-10Y | 47.2" | 15.7" | 51.2 - 55.1" |
| 10-12Y | 51.2" | 16.5" | 55.1 - 59.1" |
The Sleep Onesie should be fitted around the neck to avoid your child slipping through. 2.5 TOG and 3.5 TOG Sleep Onesies should not be used in a 5-point harness or car seat for safety reasons.
- Free delivery on orders over $100*
- Estimated dispatch: 14 April 2026
- 30-day returns & exchanges
- Ranil W.Verified BuyerReviewingSleep Onesie 2.5 TOG Oatmeal MarleI recommend this productRated 5 out of 5 stars4 minutes agoSo cosy
We love ot, so practical and cosy, the material feels very soft and our little one's temparature is well regulated in this Sleep Onesie. Can recommend! We ordered it too big, so she will be able to use it for longer... :)
- Aziza A.Verified BuyerReviewingSleep Onesie 2.5 TOG Petit PretzelI recommend this productRated 5 out of 5 stars6 days agoTop quality
Quality is good
Keeps my baby warm
- Sirrah B.Verified BuyerReviewingSleep Onesie 2.5 TOG Grey MarleI recommend this productRated 5 out of 5 stars2 weeks agoSuper warm
Really too warm to get much use out of it where I live!