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: 29 March 2025
- 30 day returns & exchanges*
- Maya P.Verified Buyer3/21/25ReviewingSleep Onesie 2.5 TOG PartyRated 5 out of 5 starsBees knees!
I absolutely love Ergopouch products, and have been a loyal customer since I had a child. Beautifully designed, excellent quality products! A beautiful Australian brand that doesn’t compromise quality. This design is an absolute favorite
- Maya P.Verified Buyer3/21/25ReviewingSleep Onesie 2.5 TOG PicnicRated 5 out of 5 starsBees knees!
I absolutely love Ergopouch products, and have been a loyal customer since I had a child. Beautifully designed, quality products! A beautiful Australian brand that doesn’t compromise quality. Love
- Rebecca S.Verified Buyer3/19/25ReviewingSleep Onesie 2.5 TOG Fruit SaladRated 5 out of 5 starsPerfection!
My littleone LOVES her sleep onsie! She HATED sleep sacks….. she would wake up yelling “STUCK! STUCK!” because she loves a or in her sleep. This was the PERFECT solution!
The stretchy arms are genius…. we’ve tried others and it was a fight to get the arms through…. the convertible feet are fantastic and the print is adorable . I will be purchasing a backup soon!
Thanks for keeping my little warm and cozy at night!