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Happiest Baby

Happiest Baby SNOO Sleep Sack - 100% Organic Cotton Baby Swaddle Blanket - Doctor Designed Promotes Healthy Hip Development (Tie Dye Rainbow, Medium)

  • Based on 1,490 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Mar 21
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Color: Tie Dye Rainbow


Size: Medium


Features

  • #1 Swaddle New York Times: Rated Americas best baby swaddle, our SNOO Sleep Sack was designed by top pediatrician and worlds leading hip-safe swaddling expert, Dr. Harvey Karp. Perfect for healthy, growing hips (International Hip Dysplasia Institute seal of approval).
  • 100% Organic Cotton: Made from luxuriously soft organic cotton with special wings that attach to our SNOO Smart Sleeper to keep babies safely on the back. Includes extra-quiet Velcro for escape-proof security and 2-way zipper that opens from top or bottom for easy midnight nappy changes.
  • More Infant Sleep: Our baby swaddle sleep sack prevents startles and boosts babies sleep quality with special inner flaps that give the snug embrace your baby boy or girl loved in the womb. Arm openings can unsnap to allow for arms out. Great transitional swaddle for moving to crib with arms free independent sleep training.
  • 5-Second Baby Swaddle: The Happiest Baby Swaddle is the easiest, safest, fastest, escape-proof baby swaddle wrap. It promotes self-soothing and keeps babies sleeping longer than other swaddles.
  • Prevents Overheating: Breathable mesh at shoulders and legs of baby warp reduce risky overheating. More secure and comfortable than other swaddlers, blankets, or baby sleepers.

Description

SNOO Sack and SNOO Comforter Sack (our warmer wrap), were specially designed to be used in SNOO Smart Sleeper to help babies sleep safer, longer, and happier! And because SNOO Sack was created by world-renowned pediatrician Dr. Harvey Karp, you can trust that every detail was designed with baby safety and parent sanity in mind!

Material: 95% Organic Cotton, 5% Elastane and Shell 2 100% Polyester


Color: Tie Dye Rainbow


Brand: Happiest Baby


Special Feature: Breathable


Style: Modern


Material: 95% Organic Cotton, 5% Elastane and Shell 2 100% Polyester


Color: Tie Dye Rainbow


Brand: Happiest Baby


Special Feature: Breathable


Style: Modern


Blanket Form: Swaddle


Age Range (Description): Baby


Product Dimensions: 23.2"L x 13"W


Theme: Tie Dye


Pattern: Tie Dye


Seasons: Fall, Winter


Fill Material: Cotton


Product Care Instructions: Machine Wash


Size: Medium


Fabric Type: 95% Organic Cotton, 5% Elastane and Shell 2 100% Polyester


Unit Count: 1.0 Count


Number of Items: 1


Fabric Warmth Description: Lightweight


UPC: 817720025790


Manufacturer: Happiest Baby


Item Weight: 12.3 ounces


Department: Unisex Baby


Item model number: 5221SNSS140


Date First Available: September 14, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Mar 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • must buy
Color: Ivory Planets Size: Medium
The Happiest Baby SNOO Sleep Sack is excellent quality. The 100% organic cotton is soft, breathable, and gentle on baby’s skin. The design makes swaddling easy and secure, helping baby feel calm and comfortable. It’s well made, washes well, and holds up beautifully over time. A great investment for better sleep and peace of mind. ... show more
Reviewed in the United States on December 19, 2025 by Anna Derderian
    • Perfect swaddle
Color: Graphite Stars Size: Small
Can’t live without!! The ONLY swaddle our baby can’t escape! Extremely easy to use. Color exactly as pictured. Has lasted for several months, does start to lose velcro stick after about a month or 2 but the zipper keeps it secured. Not super warm, perfect for 70° sleeping temps!
Reviewed in the United States on December 30, 2025 by william
    • Nice infant straight jacket
Color: White Size: Large
Our baby is long and this was perfect to strap her on down in the snoo. This one has the Velcro between the crotch which helps keep them from busting out and having an arm pinned up against their head.
Reviewed in the United States on January 21, 2026 by Lucas
    • Well-made, and awesome color
Fits great and looks awesome! Definitely nice to have an extra one for the Snoo
Reviewed in the United States on December 18, 2025 by Shayway
    • Easy, Secure, Cute, and Baby Approved !
Review Image by Danielle Cloutier Danielle Cloutier
This swaddle is way better than the standard white one that came with our Snoo. The material feels softer and sturdier, and my baby clearly prefers it — he settles faster and sleeps more soundly in this one. The zipper is smooth, it’s easy to wash, and it holds up great. Definitely worth getting as a backup or upgrade to the original. Sizing runs true, so if your baby is on the longer side, you might want to move up to the next size sooner than expected. Overall, this swaddle is a total win in our house. It keeps our baby safe, soothed, and snuggled — and that means a lot more sleep for us too. ... show more
Reviewed in the United States on May 30, 2025 by Danielle Cloutier Danielle Cloutier
    • 5 week old baby sleeps happily in his Snoo sacks!
Color: Teal Planets Size: Small
I purchased the Snoo Sleep Sack in the Teal Planets color in size small and I have been very happy with it for my 5 week old. The fabric on this version feels noticeably softer and stretchier than the plain white Snoo sacks that I also own. My baby is over 9 pounds and 22 inches long and the Small is still fitting him well while allowing him to sleep comfortably. It's so easy to swaddle him with the velcro and zip up closure. It does a great job regulating temperature. Even during winter we do not need to layer him heavily and he sleeps very well in this sleep sack. He always seems comfortable wearing it and despite being only 5 weeks he is starting to have long sleep stretches! I definitely think part of this is because of how cozy he feels in his Snoo sacks! I would definitely purchase more of these and would choose this fabric over the plain white versions due to how soft and flexible it feels. ... show more
Reviewed in the United States on January 1, 2026 by Melisa Z.
    • Great
Color: Tie Dye Rainbow Size: Medium
I really liked the material of this product. It's thick and well-made. The tie-dye pattern is a fun break from the gray and white monotony of other Snoo products. Easy to use. MUST BE USED WITH SNOO SMART SLEEPER. If you are looking for a swaddle, pick the Happiest Baby Sleepea Swaddle.
Reviewed in the United States on January 14, 2026 by Elisabeth F
    • Great product, bad smell
Color: White Size: X-Large
Works fine. Fits the snoo, but had a bad “packaging” smell when it arrived. Had to wash it twice.
Reviewed in the United States on November 28, 2025 by Grace

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