For babies who are being treated for Developmental Dysplasia of the Hip (DDH), and are required to wear a special brace (orthosis).
Size Guide
Hip Harness Cocoon Swaddle Sack
The Hip Harness Cocoon Swaddle Sack has been tested to fit the Pavlik Harness, Denis Browne Brace and Rhino Brace. Please use your child's weight to find the most appropriate and safe size for them. To comply with safety requirements, our Cocoon Swaddle Sacks have a firm fit around the neck, shoulder and chest area to prevent your little one from slipping inside. You should be able to put 2 fingers inside the neck opening for the correct fit. Please do not size up to the next size until your child meets the weight requirement, for safety reasons. When on your child, the swaddle will have additional length below the harness. This length can be left as is, or rolled up underneath the harness for your child's brace to rest on, if that's comfortable for them. Once your child is out of their hip harness, they can continue to safely use the Cocoon Swaddle Sack until they are ready to move into another one of our Sleeping Sacks.
| ergoPouch size | 3-6M* | 6-12M^ |
|---|---|---|
| Same as size | 00 | 0 |
| Chest width (cm/inch) | 24cm / 9.4" | 27cm / 10.6" |
| Bottom width (cm/inch) | 62cm / 24.4" | 70cm / 27.6" |
| Pouch length (cm/inch) | 70cm / 27.6" | 76cm / 29.9" |
| Child weight (kg/lb) | 6-8kg / 13-18lb | 8-10kg / 18-22lb |
| Child height (cm/inch) | 62-68cm / 24.4" - 26.8" | 68-76cm / 26.8" - 29.9" |
*Previously size 2-6 months, suitable for child weight 5-8kg
^Previously size 3-12 months, suitable for child weight 7-10kg
- Free delivery on orders over $70*
- Estimated dispatch: 07 December 2025
- Extended Holiday Returns until Jan 31st
- Milissa J.Verified Buyer11/18/25ReviewingHip Harness Cocoon Swaddle Sack 2.5 TOG Oatmeal MarleRated 5 out of 5 starsA great sleeping bag for HDD Babies
This has been a great sleeping bag for babies with HDD, it fits my three month old perfectly and keeps her warm. Definitely recommend for everyone to try it !! Great product!!
- Carol A.Verified Buyer3/14/25ReviewingHip Harness Cocoon Swaddle Sack 2.5 TOG Oatmeal MarleRated 1 out of 5 starsUnable to return!
This runs small especially around the neck! We tried to return after having for less than a week and were unable to because we had thrown away the packaging and washed it prior to trying it!
- Rachael N.Verified Buyer7/14/22ReviewingHip Harness Cocoon Swaddle Sack 2.5 TOG Grey MarleRated 5 out of 5 stars5 Stars
We use this for our little one who is in a hip harness. She’s usually a size 0000, but this one fits her well, and looks like it will fit another couple of sizes up as well.
