Our Most-Loved

Heritage23 Sleeponesie 2.5T Dragonflies Front

Sleeponesie 2.5T Dragonflies Infant Sitting

Our Most-Loved

3.5 TOG

Sleep Onesie 3.5 TOG Dragonflies

Name: Sleep Onesie 3.5 TOG Dragonflies
Brand: ergoPouch
SKU: EPSO-3.5T06-12MDF23
Price: 79.95 AUD
Availability: InStock
Rating: 4.8 (1977 reviews)

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.

4.8

Rated 4.8 out of 5 stars

1,977 Reviews

Size

Size Guide

6-12M 12-24M 2-3Y 4-5Y

Size Guide

Sleep Onesie

CM Inches

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

Product variants

Free delivery on orders over $100*
Estimated dispatch: 19 October 2026
30-day returns & exchanges

4.8

Rated 4.8 out of 5 stars

Based on 1,977 reviews

Customers Talked About

Reviews Summary

Customers say this sleep onesie keeps their little ones warm and comfortable while allowing freedom to move and crawl. Many praise the soft fabric, quality construction, and convenient zipper design for easy diaper changes. The convertible feet are appreciated for warmth while enabling toddlers to walk and play. Some note the sleeves lack insulation and can feel thin, and a few mention sizing runs small or tight. Overall, parents find it an excellent solution for active sleepers who kick off blankets.

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1,977 reviews

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Lea E.
Verified Buyer
Reviewing
Sleep Onesie 2.5 TOG Grey Marle
I recommend this product
Rated 5 out of 5 stars
2 weeks ago
Fantastic crawl friendly sleep sack
This sleepsack is just fantastic and one of a kind. Baby is so warm at night and free to move without needing a blanket! Parents and baby sleep happily all night
QualityRated 5.0 on a scale of 1 to 5
ValueRated 5.0 on a scale of 1 to 5
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Angela P.
Verified Buyer
Reviewing
Sleep Onesie 2.5 TOG Daydream
I recommend this product
Rated 5 out of 5 stars
3 weeks ago
Great for a toddler on the move
Our toddler loves to be able to move and climb even with the sleeping bag on, as well as the cozyness of tucked in feet.
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Rebekah
Reviewing
Sleep Onesie 2.5 TOG Starbeam
I recommend this product
Rated 5 out of 5 stars
2 months ago
5 Stars
Toddler loves the sleep onsie especially that he can walk easily in it
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