Sleep Onesie 2.5 TOG Oatmeal Marle
The Sleep Onesie is a TOG-rated sleep sack alternative, designed to be worn on its own during sleep or with a Romper/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.
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" |
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 |
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 $70*
- Estimated dispatch: 22 May 2026
- 30-day returns and exchanges
- Sumita C.Verified Buyer5/15/26ReviewingSleep Onesie 3.5 TOG SageRated 5 out of 5 starsWow
Really love all of your products. The quality is really strong and its so warm. Such a life saver in winter. I’d buy one of everything if I could!
- Kimberly S. M.Verified Buyer5/13/26ReviewingSleep Onesie 3.5 TOG DaisiesRated 5 out of 5 starsVery comfy and safe
This sleep onsie is the perfect option for little ones who constantly kick the covers off even on freezing cold nights and prefer to have their feet out. My little girl can move around in it easily before bed and it keeps her so warm, she has worn it with nothing underneath and worn it with pyjamas underneath and both are comfortable and not too tight or restricting.
- Hayley R.Verified Buyer4/23/26ReviewingSleep Onesie 3.5 TOG Bon AppetitRated 5 out of 5 starsSuch a good alternative!
My daughter has hated sleep sacks since she was about 10 months old and we switched to the sleep layers over summer, and the sleep onesies are now perfect for the cooler nights! She's in a floor bed so it gives me peace of mind she and get up and move around without falling over too. Also love they're 100% cotton so they don't flare up her eczema!
