Sleep Onesie 1.0 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.
| 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 delivery on orders over $100*
- Estimated dispatch: 11 June 2026
- 30-day returns & exchanges
- Sirrah B.Verified BuyerReviewingSleep Onesie 1.0 TOG Grey MarleI recommend this productRated 5 out of 5 stars1 month agoFLUFFY 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.
- CourtneyReviewingSleep Onesie 1.0 TOG Grey MarleI recommend this productRated 5 out of 5 stars1 year ago5 Stars
Purchased this for my 5 month old, we never swoddled her. We tried the closer convertible bag suit but because she moved so much at night, when we woke up she ended up with both her legs in one leg hole.
This suit is a great option and seems to be going the trick.
- DemiReviewingDisney Sleep Onesie 1.0 TOG PrincessI recommend this productRated 5 out of 5 stars2 years agoPerfect
Perfect, love the short sleeves. The leg cuffs are snugg enough to stay in place all night, so even tho its huge it fits fine and will for ages!!