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Grey Swaddle Sleep Sack
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Owned by a small family MoogCo Baby is a family-owned shop. Every order supports a real family who personally stands behind what we sell — thank you for shopping small. 💚
Your Baby's Snug Hug for Safe and Sound Sleep
Give your baby the gift of better sleep with the Swaddle Sleep Sack, the world's first 3D knit seamless swaddle. It provides the perfect blend of comfort, safety, and freedom, creating an ideal environment for serene and self-soothing sleep. As your child grows or starts to roll over, it easily transitions into a wearable blanket for increased movement, just leave their arms out to ensure safety and comfort. This feature makes the Swaddle Sleep Sack a thoughtful and practical gift for new parents.
Our Hug Technology® gently cradles your baby to self-soothe through Moro reflex and active sleep, encouraging a deep sense of calm. Designed in compliance with AAP guidelines, the Swaddelini ensures a secure fit around the chest and appropriate looseness around the hips for safe and comfortable infant care.
In this Swaddle Sleep Sack, your little one spends each night in comfort and safety, warmed by the echo of your caring embrace with the innovative design of Hug Technology®.
All orders are processed and shipped within a maximum of 2 to 5 business days. Please note that this is an estimated timeline and does not constitute a guarantee, as national holidays and other external factors may impact final delivery and shipping times.
🚚 Free Shipping and Discount Clarification
For qualifying orders of $100 or more, the maximum available discount applied to your order is $30.
For customizable orders, please enter your specific details in the 'Add a note' section of your cart. We kindly ask that you carefully review your input for any typos


Hug Technology gently cradles your baby to help settle the Moro reflex and active sleep. The snug, seamless knit echoes your caring embrace so your little one can self-soothe and drift back to sleep more easily.

As your child starts to roll, the swaddle transitions into a wearable blanket. Simply leave their arms out for safe, comfortable movement, so one piece supports the newborn stage and beyond.

Built in line with AAP guidance, the fit is secure around the chest and comfortably loose around the hips for healthy movement. The easy access diaper flap means quick nighttime changes without unwrapping.
A few simple factors help you pick a swaddle that fits well and keeps your baby safe and comfortable.
- Get the size right: Size small suits 6 to 12 pounds and works well if you are still expecting. Choose large for babies already over 10 pounds, roughly 12 to 18 pounds.
- Look for a safe fit: A good swaddle is snug around the chest but loose around the hips to support healthy hip movement. Avoid anything that feels tight at the legs.
- Plan for rolling: Once your baby shows signs of rolling, switch to an arms-out style. A design that converts to a wearable blanket saves you from buying twice.
- Match warmth to the room: Use the room temperature to decide how many layers to put underneath. Warmer rooms need fewer layers so baby does not overheat.
- Choose easy nighttime access: A diaper flap or easy opening lets you change baby quickly without full unwrapping, which keeps everyone calmer at 3 a.m.
What size should I order?
Choose small for 6 to 12 pounds, which is ideal if you are still expecting. If your baby is already here and over 10 pounds, order the large, which fits roughly 12 to 18 pounds.
Is this safe once my baby starts rolling?
Yes, it transitions into a wearable blanket. Once your baby shows signs of rolling, simply leave their arms out so they can move freely and safely.
How is this different from a traditional swaddle?
It uses a slip-on, seamless knit design, so there is no wrapping or re-wrapping. It stays in place through the night and will not unravel the way wrapped swaddles can.
How do I dress my baby underneath it?
Match layers to your room temperature. In cooler rooms add layers underneath, and in warmer rooms use fewer or none so your baby stays comfortable and does not overheat.
Can I change a diaper without taking it off?
Yes. An easy access diaper flap lets you handle changes quickly without fully unwrapping your baby, which helps keep nighttime changes calm.
How do shipping and returns work?
We ship from a US warehouse with free US shipping on orders over $100. We also offer 30-day returns and real human customer support if you need help.
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"I was lucky to find this pad for my grandson’s bassinet. I like how it is all natural snd organic. Just make sure to buy it a little bigger because it shrinks after washing. Also give ample time…"
"These helped at first but it seemed like the edges dug into my skin making it irritated (might have needed the larger ones). Once my milk came in more, milk would spill everywhere. I found that milk…"
"Perfect. Great price and my little one very opposed to training has only had accidents in the last week. My daughter is 2yrs old, 27 lbs and the Medium is perfect. She has room in them but the arent…"
"Initially, I was skeptical of using it, but when my doc referred it to me for my cracked nipple, it worked like a charm. I did not want to put any balm or lotion over my nipple as I did not wanted…"
"Amazing tool for breastfeeding! These protect sensitive, chapped or cracked nipples like little shields. No more sticking to clothing/bras and wincing when anything bumps into my chest. I've been…"
"I cant belive they heal hours within you put them on. Totally a must while breastfeeding. Such a good quality"
"I used these for the first four weeks after baby came. It was during that phase where baby was so small he didn’t have a great latch and so I was getting sore nipples. This was great for protecting…"
"Only paci my breast feed three week old has accepted so far🙌🏼"
"Worked great and would definitely use again. The only thing is sizing can be tricky. I would’ve gotten a size bigger and I’d consider my size to be on the smaller side. If you’re not sure, just size…"
"I wore these for the first two months and they truly saved my breastfeeding journey - worked exactly how I expected. They gave instant relief. I basically wore them day and night for the first 6…"
"Love these , I bought due to damage from pumping . One week with creams and balms didn’t do much but two days with these and I’m almost healed !"
"LIFE. SAVER. Bought this the first week I started nursing my son and had the WORST cracked nipples. These solved the issues OVERNIGHT!"
"I was lucky to find this pad for my grandson’s bassinet. I like how it is all natural snd organic. Just make sure to buy it a little bigger because it shrinks after washing. Also give ample time…"
"These helped at first but it seemed like the edges dug into my skin making it irritated (might have needed the larger ones). Once my milk came in more, milk would spill everywhere. I found that milk…"
"Perfect. Great price and my little one very opposed to training has only had accidents in the last week. My daughter is 2yrs old, 27 lbs and the Medium is perfect. She has room in them but the arent…"
"Initially, I was skeptical of using it, but when my doc referred it to me for my cracked nipple, it worked like a charm. I did not want to put any balm or lotion over my nipple as I did not wanted…"
"Amazing tool for breastfeeding! These protect sensitive, chapped or cracked nipples like little shields. No more sticking to clothing/bras and wincing when anything bumps into my chest. I've been…"
"I cant belive they heal hours within you put them on. Totally a must while breastfeeding. Such a good quality"
"I used these for the first four weeks after baby came. It was during that phase where baby was so small he didn’t have a great latch and so I was getting sore nipples. This was great for protecting…"
"Only paci my breast feed three week old has accepted so far🙌🏼"
"Worked great and would definitely use again. The only thing is sizing can be tricky. I would’ve gotten a size bigger and I’d consider my size to be on the smaller side. If you’re not sure, just size…"
"I wore these for the first two months and they truly saved my breastfeeding journey - worked exactly how I expected. They gave instant relief. I basically wore them day and night for the first 6…"
"Love these , I bought due to damage from pumping . One week with creams and balms didn’t do much but two days with these and I’m almost healed !"
"LIFE. SAVER. Bought this the first week I started nursing my son and had the WORST cracked nipples. These solved the issues OVERNIGHT!"
"Did the job, kept me more comfortable the first couple weeks postpartum as breastfeeding was established. Next time I would go for the design that has perforated holes for airflow."
"As a breastfeeding mom I truly couldn’t recommend these more. They literally SAVED MY LIFE in the newborn stage and then saved me again when teething started. They’re easy to use, easy to clean and…"
"This is a great item to have for breastfeeding mommas. It feels very cooling and refreshing after breastfeeding and makes wearing nursing bras very comfortable since the fabric is not rubbing on your…"
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"Great value for the price compared to name brand silverettes. I only really used them for maybe 2-3 weeks, so I’m glad I didn’t spend the extra money when these got the job done just as well"
"These are perfect for breastfeeding. They help keep any ointment or lanolin from getting on your clothes and smooth for immediate relief of cracks or nipple soreness in the first few weeks."
"Had a cracked nipple, added some organic ointment and put this over it, healed in 2 days! Recommend it 100%"
"These are great for nursing in the first few weeks when there’s soreness and breakdown. Would recommend!"
"These were wonderful for me postpartum while learning to breastfeed. Highly recommend. They are easy to clean & very functional."
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"These were great in the beginning helped me so much."
"Any first time mama BUY THIS PRODUCT!!!! I cannot recommend and rave about this enough. They HELPED so so much! I wore them all the time when my nipples felt dry, cracked, and just hurt. Those first…"
"Did the job, kept me more comfortable the first couple weeks postpartum as breastfeeding was established. Next time I would go for the design that has perforated holes for airflow."
"As a breastfeeding mom I truly couldn’t recommend these more. They literally SAVED MY LIFE in the newborn stage and then saved me again when teething started. They’re easy to use, easy to clean and…"
"This is a great item to have for breastfeeding mommas. It feels very cooling and refreshing after breastfeeding and makes wearing nursing bras very comfortable since the fabric is not rubbing on your…"
"These cups protect and help heal sore nipples so quickly. Comfortable under a bra, easy to clean, and worth the investment for breastfeeding. Stats: 5’3”, 140 lbs, 8 weeks postpartum & nursing"
"Great value for the price compared to name brand silverettes. I only really used them for maybe 2-3 weeks, so I’m glad I didn’t spend the extra money when these got the job done just as well"
"These are perfect for breastfeeding. They help keep any ointment or lanolin from getting on your clothes and smooth for immediate relief of cracks or nipple soreness in the first few weeks."
"Had a cracked nipple, added some organic ointment and put this over it, healed in 2 days! Recommend it 100%"
"These are great for nursing in the first few weeks when there’s soreness and breakdown. Would recommend!"
"These were wonderful for me postpartum while learning to breastfeed. Highly recommend. They are easy to clean & very functional."
"It saved my nipples multiple times. They’re super light. Quality is good, they do bend for no reason lol overall a good product."
"These were great in the beginning helped me so much."
"Any first time mama BUY THIS PRODUCT!!!! I cannot recommend and rave about this enough. They HELPED so so much! I wore them all the time when my nipples felt dry, cracked, and just hurt. Those first…"
