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 height to find the most appropriate and safe size for them. 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.
| ergoPouch size | 6-12M | 12-24M | 2-3Y | 4-5Y | 6-8Y | 8-10Y | 10-12Y |
|---|---|---|---|---|---|---|---|
| Same as size | 0-1y | 1-2y | 2-3y | 4-5y | 6-8y | 8-10y | 10-12y |
| Pouch length (cm/inch) | 74cm / 29.1" | 84cm / 33.1" | 88cm / 34.6" | 98cm / 38.6" | 110cm / 43.3" | 120cm / 47.2" | 130cm / 51.2" |
| Chest width (cm/inch) | 27.5cm / 10.8" | 30.5cm / 12" | 32cm / 12.6" | 35cm / 13.8" | 38cm / 15" | 40cm / 15.7" | 42cm / 16.5" |
| Child height (cm/inch) | 68-84cm / 26.8 - 33.1" | 76-92cm / 29.9 - 36.2" | 92-100cm / 36.2 - 39.4" | 108-115cm / 42.5 - 45.3" | 120-130cm / 47.2 - 51.2" | 130-140cm / 51.2 - 55.1" | 140-150cm / 55.1 - 59.1" |
- Free delivery on orders over $100*
- Estimated dispatch: 13 July 2025
- 30 day returns & exchanges*
- Heather W.Verified BuyerReviewingSleep Onesie 3.5 TOG Petit PretzelI recommend this productRated 5 out of 5 starsYesterday5 stars
Super warm and comfy. My 3 year old sleeps through with this 3.5 tog sleeping bag. Love it!
- Victoria W.Verified BuyerReviewingSleep Onesie 3.5 TOG Bon AppetitI recommend this productRated 5 out of 5 starsYesterdayGreat product
We purchased this for our 3.5 year old, he kicks off the blankets overnight, it's great and a good transition from sleeping bag to just pjs. The size is nice and big and loose so its comfy for him overnight
- Calli S.Verified BuyerReviewingSleep Onesie 2.5 TOG Petit PretzelI recommend this productRated 5 out of 5 stars4 days agoThese are by far the best
I accidentally bought the sleeping bag sleep suits and open3d the packaging on one so couldn't return it even though it is unused. I returned the packaged one for this and these are the absolute best !! I wish I had originally bought these!