Sleep Onesie 1.0 TOG Grey 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.
| 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 |
| 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.
See full size guide for all products
- Free standard shipping sitewide
- Estimated dispatch: 07 June 2026
- 30-day returns and exchanges
- Sirrah B.Verified Buyer4/7/26ReviewingSleep Onesie 1.0 TOG Grey MarleRated 5 out of 5 starsFLUFFY FLEECE
My daughter can't stand having her legs confined in a more traditional sleep sack, but will gladly wear this! Made of the most soft, fluffy fleece. We do have the warmer onesie but she tends to sleep warm so this is our daily wear for most of the year in Northern California.
- Olivia B.Verified Buyer6/17/22ReviewingSleep Onesie 1.0 TOG Grey MarleRated 5 out of 5 stars5 Stars
Great fit, a little big but growing room is good haha! Very cosy and soft
- Olivia B.6/17/22ReviewingSleep Onesie 1.0 TOG Grey MarleRated 5 out of 5 starsGreat fit, a little big
Great fit, a little big but growing room is good haha! Very cosy and soft
