Perfect fit and nice and warm
Love these and we upped from 2.5 with 1 onsie to a 3.5 bag and so glad, baby sleeping so well and comfy! Easy on off or to change if you need to in middle of the night.




The sleep sacks are made of high-quality, soft, and thick material that provides excellent insulation, even in very cold climates. The full-length zipper and long sleeves are appreciated features that help keep babies' hands and bodies warm. Customers report the sleep sacks have helped their babies sleep better and through the night, with fewer instances of waking up cold. However, some experienced issues with the sleeves being too short or the overall size being too large for smaller infants. A few also mentioned pilling or fading of the fabric after washing.
Select a rating to filter the reviews.
4.5
91 reviews
92% would recommend this product
1-15 of 59 written reviews
Perfect fit and nice and warm
Love these and we upped from 2.5 with 1 onsie to a 3.5 bag and so glad, baby sleeping so well and comfy! Easy on off or to change if you need to in middle of the night.
Perfect size for our newborn
So easy to use and fits our newborn perfectly - turns out she’s an arms up sleeper so great to be able to use this with her arms out after swaddling for the first few days.
My baby is now sleeping 4 hour stretches!
My baby was up every hour before purchasing. Now sleeping 4 hour stretches! This momma cannot be more thankful!
Cosy and warm.
Great product made very well. My child loves the suit and sleeps even better.
My favourite sleeping bags
I have always bought ergo pouch because of the quality natural fabrics & the quality of the make. You can wash these time and time again and never have any shrinkage
Sleeves too short
We have a couple of these sleep sacks that were gifted to us for Christmas and love how warm they have keep my baby during this winter in a house without great heat. However the sleeves are just too short, so his hands are always popping out of the hand covers and get super cold unfortunately. I don’t know if my son has long arms relative to other babies (he seems pretty proportional to me, he’s in the 60% for height) but the sleeves have been too short the entire time we’ve had these sleep sacks (from 5m until now 8months).
Great sleep pouch
Warm, sleeves are like a sweat shirt material. Washes and drys well.
3.5 TOG!
3.5 TOG sleep sacks is the reason we found ergoPouch, and 2 years into using them we are still happy customers. My toddler loves his blue dragonfly sleeping bag.
Love the sleep sack
Two babies in and all I use is ergopouch. The best sleep sack.
Sleep Sack 3.5
Absolutely love the ergoPouch sleep sacks in general and the 3.5 TOG for the colder nights!!!
Highly Recommend!
We live in a place where it is not unsurprising when it gets to -40o F, and our winters are loooong. We have had these sleep sacks for 2 winters now, sizing up when our little dude outgrows, and they keep him sleeping soundly.
So cosy and great quality
We bought two of these for our twin girls and they seem to really love them. They are a really good quality material, nice and thick, and keep them really warm and cosy. The fact they are much longer than the standard 0-6 month sleeping bags is also great as our girls are on the longer side and were finding the shorter bags annoying. We'll definitely buy again.
Keeps her warm and safe.
I just wish they had a smaller size. My baby rolled over very early, and is in the 2nd percentile- so small. This was the smallest 3.5 tog u found that had sleeves for a two month old.
Super snug
Our little one was waking in the night a lot more before we got this. Keeps her snug all night through.
3.5 TOG Sleep Sack
We purchased this sleep sack in hopes that it would help baby sleep better overnight and it did just that. The sleep sack itself is well made. I was worried the zipper being front and center would be an issue because our baby likes to sleep on his stomach but no issues! He's never slept better.
Select a rating to filter the reviews.
4.5
91 reviews
92% would recommend this product
1-15 of 59 written reviews
Perfect fit and nice and warm
Love these and we upped from 2.5 with 1 onsie to a 3.5 bag and so glad, baby sleeping so well and comfy! Easy on off or to change if you need to in middle of the night.
Perfect size for our newborn
So easy to use and fits our newborn perfectly - turns out she’s an arms up sleeper so great to be able to use this with her arms out after swaddling for the first few days.
My baby is now sleeping 4 hour stretches!
My baby was up every hour before purchasing. Now sleeping 4 hour stretches! This momma cannot be more thankful!
Cosy and warm.
Great product made very well. My child loves the suit and sleeps even better.
My favourite sleeping bags
I have always bought ergo pouch because of the quality natural fabrics & the quality of the make. You can wash these time and time again and never have any shrinkage
Sleeves too short
We have a couple of these sleep sacks that were gifted to us for Christmas and love how warm they have keep my baby during this winter in a house without great heat. However the sleeves are just too short, so his hands are always popping out of the hand covers and get super cold unfortunately. I don’t know if my son has long arms relative to other babies (he seems pretty proportional to me, he’s in the 60% for height) but the sleeves have been too short the entire time we’ve had these sleep sacks (from 5m until now 8months).
Great sleep pouch
Warm, sleeves are like a sweat shirt material. Washes and drys well.
3.5 TOG!
3.5 TOG sleep sacks is the reason we found ergoPouch, and 2 years into using them we are still happy customers. My toddler loves his blue dragonfly sleeping bag.
Love the sleep sack
Two babies in and all I use is ergopouch. The best sleep sack.
Sleep Sack 3.5
Absolutely love the ergoPouch sleep sacks in general and the 3.5 TOG for the colder nights!!!
Highly Recommend!
We live in a place where it is not unsurprising when it gets to -40o F, and our winters are loooong. We have had these sleep sacks for 2 winters now, sizing up when our little dude outgrows, and they keep him sleeping soundly.
So cosy and great quality
We bought two of these for our twin girls and they seem to really love them. They are a really good quality material, nice and thick, and keep them really warm and cosy. The fact they are much longer than the standard 0-6 month sleeping bags is also great as our girls are on the longer side and were finding the shorter bags annoying. We'll definitely buy again.
Keeps her warm and safe.
I just wish they had a smaller size. My baby rolled over very early, and is in the 2nd percentile- so small. This was the smallest 3.5 tog u found that had sleeves for a two month old.
Super snug
Our little one was waking in the night a lot more before we got this. Keeps her snug all night through.
3.5 TOG Sleep Sack
We purchased this sleep sack in hopes that it would help baby sleep better overnight and it did just that. The sleep sack itself is well made. I was worried the zipper being front and center would be an issue because our baby likes to sleep on his stomach but no issues! He's never slept better.
• TOG Rated 3.5 TOG, suitable for inside room temperatures 14-21C°
• Stretch Jersery: slim fit, soft, stretchy design recommended as baby's 'first sleeping bag' after the swaddling phase is over
• Hip Friendly: the bell shaped bottom promotes healthy hip joint development
• Zip 2-ways: zip down from the top to dress your baby or zip up from the bottom to change their nappy
• 100% Organic Cotton Filling: skin-friendly, promotes breathability and prevents sweat resting on sensitive skin
The Jersey Sleeping Bag is designed for an infant who is sleeping with their arms-out (no longer swaddled) and prefers a snug fit through their torso. If your child has outgrown their beloved ergoPouch Cocoon Swaddle Bag, this sleeping bag will mimic a familiar feel (same fabric and comforting fit), making it a popular progression choice. 3.5 TOG is suitable for room temperatures of 14-21C°.
Product Safety Standard:
• TOG Rated 3.5 TOG, suitable for inside room temperatures 14-21C°
• Stretch Jersery: slim fit, soft, stretchy design recommended as baby's 'first sleeping bag' after the swaddling phase is over
• Hip Friendly: the bell shaped bottom promotes healthy hip joint development
• Zip 2-ways: zip down from the top to dress your baby or zip up from the bottom to change their nappy
• 100% Organic Cotton Filling: skin-friendly, promotes breathability and prevents sweat resting on sensitive skin
The Jersey Sleeping Bag is designed for an infant who is sleeping with their arms-out (no longer swaddled) and prefers a snug fit through their torso. If your child has outgrown their beloved ergoPouch Cocoon Swaddle Bag, this sleeping bag will mimic a familiar feel (same fabric and comforting fit), making it a popular progression choice. 3.5 TOG is suitable for room temperatures of 14-21C°.
Product Safety Standard:
| Package Dimension (cm) | 34.5H x 4L x 26.5W |
| Package Weight (kg) | 0.5 |
| Material | Body, Sleeves and Lining: 95% Organic Cotton / 5% Elastane / Filling: 100% Organic Cotton |
| Country Of Origin | CHINA |
| Package Dimension (cm) | 34.5H x 4L x 26.5W |
| Package Weight (kg) | 0.5 |
| Material | Body, Sleeves and Lining: 95% Organic Cotton / 5% Elastane / Filling: 100% Organic Cotton |
| Country Of Origin | CHINA |
We offer an exchange, store credit or refund within 30 days of purchase or, an exchange or store credit after 30 days. For members of BBfamily, it's extended to 60 days. Terms and conditions apply.
Excluded from returns:
View our full Change of Mind Return Policy here.
We offer an exchange, store credit or refund within 30 days of purchase or, an exchange or store credit after 30 days. For members of BBfamily, it's extended to 60 days. Terms and conditions apply.
Excluded from returns:
View our full Change of Mind Return Policy here.
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