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: 17 May 2025
- 30 day returns & exchanges*
- Pei1 week agoReviewingSleep Onesie 3.5 TOG Bon AppetitRated 5 out of 5 stars5 Stars
Love them
- Ayushi M.Verified Buyer2 weeks agoReviewingSleep Onesie 3.5 TOG DaisiesRated 4 out of 5 starsGood for sensitive ones
My 10 month old is so sensitive to changing temperatures that she immediately develops a runny nose! I ordered a 12-24 month size for her because Ergopouch does 'slim fits' which don't fit my child in her normal size range. Right now this sleep onesie is long for her legs but overall I think it keeps her warm because of the 3.5 tog and since her nose has not acted up.
- Emma H.Verified Buyer1 month agoReviewingSleep Onesie 3.5 TOG DragonfliesRated 5 out of 5 stars“So snuggly” says Mr 2.5
I bought this sleep onsie because our 2.5year old sleeps in a double bed but refuses to sleep under the covers. Not such a big deal over summer but now it’s getting colder in NZ he was waking up around 3-4am because he was cold. Since we bought the sleep onsie, he’s back to sleeping through the night. “It’s so snuggly”, he says. He loves it so much that it’s really hard to get him to take it off in the mornings!