7 Best Sleep Sacks
Amazon

Written by Mindsmaking Medical Writer
Fact Checked by Mindsmaking Professionals
21st, July, 2025
A cosy sleep sack is essential once your baby starts rolling. We’ve found the best options for breathability, safety, and comfort. The Halo Sleepsack Wearable Blanket is our top pick, praised for its lightweight fabric and easy-to-use inverted zipper.
When your baby starts rolling around, it is time to transition from a snug swaddle to a cosy, safe sleep sack that guarantees a good night's sleep for both of you. We understand the importance of sleep, so we have researched and compiled the best baby sleep sacks to add to your newborn checklist.
Here's a sneak peek of our 7 Best Sleep Sacks







Best Organic Cotton Sleepsack
Burt's Bees Baby Unisex Unisex-Baby Beekeeper Wearable Blanket
Price: $19
Amazon
How we Choose the Best Sleep Sacks
When selecting a safe sleep sack, choosing one made from breathable material with a low Thermal Overall Grade (TOG) level is crucial. A low TOG rating ensures the fabric does not overheat your baby, which is important for their comfort and safety. Overheating can be dangerous and increase the risk of Sudden Infant Death Syndrome (SIDS). (2) NHS
Some sleep sacks can be used as swaddles. However, it is essential to allow your baby's arms to be free once they start rolling. If a baby rolls onto its stomach and its arms are confined inside a sleep sack or swaddle, it may struggle to roll back, which poses a significant risk. Babies should never be face down on a mattress with their arms restricted.
For babies starting to roll over, sleeveless sleep sacks are the safest option. These allow free arm movement, enabling your baby to push up and reposition themselves safely if they roll onto their stomach. Choosing the right sleep sack helps ensure your baby sleeps comfortably and safely.
Our 7 Best Sleep Sacks
Halo Sleepsack Wearable Blanket
Why we like
- Trusted brand
- Soft and light
- Prevents overheating
- Inverted zipper for easy diaper changes.
Something to Note
- Frequent washings can cause the zipper to lose its integrity over time.
- It may be too spacious for babies younger than 6 months.
Customer’s Review
One mom couldn’t stop praising their beloved sleep sack, declaring, "We love this sleep sack! It has been our go-to every night for three months, adapting beautifully through various seasons and climates." She especially adores the adorable llama print, and their large size for their 10-month-old fits perfectly, even as she grows into 13 months. Initially, the sack felt a bit big, but she reassured everyone that it was never unsafe. Her chunky baby has had no trouble with it slipping off her arms or over her head, which is a relief for any parent!
Another mom chimed in, sharing her experience: "In our previous cold mountain town, we paired it with a warm onesie, but now in a hot climate, our baby only needs a diaper inside." Since her little one started walking, they unzip the bottom so she can roam freely, wearing the top like a cape under supervision. She also praised the sleep sack’s quality, noting, "It’s held up to use for three months with no issues at all near-nightly." The metal zipper makes diaper changes a breeze, and she found that it repels stains remarkably well.
Halo Sleepsack Swaddle
Why we like
- Versatile with three different ways to use
- Convenient for diaper changes
Something to Note
- Velcro flaps may lose their shape over time.
Customer’s Review
One mom could not contain her excitement as she shared her love for this sleep sack, proclaiming, "This sleep sack is the best!" She raved about how wonderfully her baby sleeps in it, highlighting that it is not too long, preventing it from getting in the way during those late-night and early-morning diaper changes, which she found frustrating with other brands. Her baby, who dislikes having his arms pinned down, was a source of concern for her, especially since they worried about him wiggling a wearable blanket over his face. But with this sleep sack, they found the perfect solution: it keeps his arms out while snugly wrapping him up, ensuring the fabric stays safely away from his face.
Another mom chimed in, sharing her appreciation for the two-way zippers she described as a lifesaver. "The two-way zippers make it easy for late-night diaper changes." However, she did note that sometimes the zipper can be tricky to hook at the top when putting it on, and there were a few instances where her hands slipped, causing them to bump their baby's chin. Despite that minor hiccup, she emphasised how convenient the design is overall.
Tealbee Dreamsuit
Why we like
- Crafted from premium bamboo and organic cotton fabric
- Hypoallergenic, perfect for sensitive skin
- Temperature-regulating to keep your baby comfortable
- Available in sizes up to four years
- Free from harmful chemicals
Something to Note
- Footed design allows toddlers to climb out of the crib more easily.
Customer’s Review
One mom shared her delight over these sleep sacks, saying, "I had one from my daughter that I started using for my son because, in true second-kid fashion, he transitioned out of everything way faster than I was ready for! It already had over a year of use and was still in amazing shape." She could not resist grabbing a backup when she spotted a new brushed print design. "It is even cuter in person, and so soft! Plus, it keeps him warm at night, which is perfect since our room is cooler. I can’t recommend it enough!"
Another mom found the sleep sack ideal for her 18-month-old. "The material, weight, and softness are perfect, though it is a bit big. I just roll up the ankle cuffs, and it works great." She did mention a funny challenge with her toddler. "I wish the zipper weren’t so easy to unzip. I have to put it on backwards because my little one takes it off when she doesn’t want to sleep!" Despite that, her daughter loves it and even asks to wear it at bedtime, showing how much comfort these sleep sacks bring to both baby and parent.
Baby Deedee Sleep Nest Warm Baby Sleeping Bag
Why we like
- Designed for durability, it offers several months of wear in each size.
- It is snug and comforting, like a baby-sized quilt.
- Features shoulder snaps for effortless dressing.
Something to Note
- It may be too warm for use during summer months or in hotter climates.
Customer’s Review
One mom raves about this sleep sack, calling it a fantastic choice for keeping her baby warm on colder nights without overheating when the temperatures are milder. She mentions that their thermostat is set around 60-62°F, but the baby's room can get even cooler. Her little one stays cosy with a onesie, footie, pyjama sleeper, and this sleep sack. It washes and dries well on a regular setting with all the other clothes.
Another mom advises against buying a small size unless you have a premature baby. She initially used a medium for her first few kids, finding it a bit roomy but functional and lasting well over a year. She mistakenly bought a small one for her latest baby, born in October, but he outgrew it by 2 months. She regrets not sticking with the medium size, though these sleep sacks are not cheap. This sleep sack is a mom's favourite for its excellent performance and durability.
Copper Pearl Sleep Sack
Why we like
- It stays soft after washing.
- Generous size range for longer use.
- Durable through multiple washes.
Something to Note
- Limited size range, only up to 12 months
- The price point is a little high.
Customer’s Review
One mom expressed excitement about the Copper Pearl sleep sack, saying, "I have no complaints about this sleep sack at all!" After receiving a 0-6 month Copper Pearl sleep sack at her baby shower, she used it every night for her baby. The super soft, stretchy, and breathable material kept her little one comfortable without getting too hot, making it a perfect fit for restful nights. When her baby outgrew the first sleep sack, she did not hesitate to get the next size up from Copper Pearl. Sleep sacks had become a game-changer for her child, especially compared to blankets that were just distractions. The larger sleep sack was just as soft and stretchy, continuing to be the go-to for every bedtime.
Another mom echoed the sentiment: "This sleep sack is exactly what I was looking for. It is perfect for my almost 5-month-old." She praised Copper Pearl's quality, noting that the sleep sack was well-made and durable. "The prints are cute too!" she added, mentioning that Copper Pearl is the brand she consistently returns to. Cozy, safe, and long-lasting, this sleep sack gave her peace of mind, holding up perfectly until it was time to move to the next size. "I would recommend it to anyone!" she said, emphasising the sleep sack’s reliability for parents seeking comfort and security for their little ones.
Kyte Baby Unisex Sleep Bamboo Sleeping Bag
Why we like
- Ultra soft material
- Silky, lightweight fabric perfect for warmer nights
Something to Note
- Quite expensive than others
Customer’s Review
One mom could not help but share her enthusiasm about the Kyte Baby sleep sacks, especially the 0.5 TOG version. She highlighted how incredibly soft and buttery the fabric feels, even after being washed countless times and used daily. The durability impressed her, as did the practicality. Another parent chimed in, mentioning how perfect the sleep sack is for travel, folds up compactly and has become an essential for those long red-eye flights. While some may initially hesitate at the price, many parents agree it is worth every penny since their little ones use it so often.
Another mom shared her enthusiasm, saying, "I’m obsessed with this sleep sack brand!" She appreciated the variety of TOG ratings, which offer options for different temperatures throughout the year. She’s purchased several for every season, and each has been super durable, zipping up easily. She especially loved the bottom zipper, which makes late-night diaper changes a breeze. Her recommendation? "Everyone should get one!"
Burt's Bees Baby Unisex Unisex-Baby Beekeeper Wearable Blanket
Why we like
- Provides extra coverage for chilly nights, crafted from soft organic cotton.
- Available in a variety of colours and patterns
Something to Note
- The zipper only operates in a downward direction.
Customer’s Review
One mom enthusiastically shared her love for Burt's Bees sleep sacks, saying, "We love the Burt's Bees sleep sacks!" When her son started daycare, they knew they needed a reliable sleep sack to send with him. They chose Burt's Bees because the material looked soft, and the easy zipper was a must-have for busy mornings. She praised the fabric, calling it "incredibly soft, lightweight, and durable," noting that it has held up beautifully through many washes, still looking as good as new!
Another mom chimed in with her thoughts on the zipper, describing it as a game-changer. "The zipper is so easy to use, especially when the baby is getting sleepy," she explained. Unlike some brands where closing the zipper feels like a struggle, this one is quick and hassle-free. She also appreciated the length, mentioning that it has always been perfect for her little guy, who is a bit tall for his age.
Woolino Four-Season Ultimate Baby Sleep Sack
Why we like
- Great temperature regulating properties, long lifespan, and roomy design
- Merino wool regulates the baby's temperature
- One-size-fits-all design
Something to Note
- Expensive, might appear quite large on newborns
Customer’s Review
One mom couldn’t help but rave about the Woolino sleep sack, saying, “I love the material, weight, and softness of this sleep sack. It is perfect for my 18-month-old.” She mentioned that while it is a bit big for her little one, rolling up the ankle cuffs does the trick, allowing her to make it work without any hassle.
Another mom added her perspective, sharing a clever workaround to keep her toddler cozy. “I will say, I wish the zipper weren't so easy to unzip,” she admitted. “I have to put it on backwards because my toddler will take it off when she doesn’t want to sleep.” Despite that little challenge, her daughter loves the sleep sack and even asks to wear it at bedtime, proving that comfort wins out.
These real-life experiences showcase the adaptability and comfort of the Woolino sleep sack, solidifying its status as a beloved choice for parents in search of quality sleep solutions for their little ones. It’s clear that, for these moms, the sleep sack is more than just a bedtime accessory; it’s a trusty companion in their parenting journey!
What to Look Out for While Shopping for Sleep Sacks
Several factors must be considered when choosing a sleep sack for your baby to ensure their safety and comfort. Here are the key points to keep in mind.
Light, Breathable Materials: Overheating can increase the risk of Sudden Infant Death Syndrome (SIDS), so selecting the right material is crucial (2). The American Academy of Pediatrics (AAP) recommends that your baby needs only one more layer than you would wear to feel comfortable (1). AAP Look for lightweight and breathable fabrics like cotton. Avoid heavy materials like fleece, which can cause overheating. Many sleep sacks have TOG (Thermal Overall Grade) ratings that indicate the temperatures they are suitable for. You might need different types for different seasons, thicker ones for colder months and lighter ones for warmer weather.
Zippers and Velcro Closures: Ease of use is vital, especially during late-night diaper changes. Choose sleep sacks with zippers that won't snag. For younger babies, inverted or double zippers are ideal for convenient diaper changes. Avoid sleep sacks with loud snaps or velcro, as these can wake your baby at night. Ensure the armholes are wide enough for easy movement.
Comfort: Your baby's comfort is paramount. Choose soft materials that feel like a blanket rather than another pair of pyjamas. The sleep sack should provide enough room for your baby to move their legs freely, particularly if they are active. Look for roomy designs that allow for movement while still being safe. Additionally, the best sleep sacks have no irritating tags and cover zippers with a layer of fabric to prevent discomfort.
Care and Wash Instructions: Sleep sacks will be used frequently, so they must withstand constant use and regular washing. Even after multiple washes, the best options will maintain their softness, quality, and colour. The material should be lightweight yet sturdy, with no pilling or tears. Follow the care instructions to keep the sleep sacks in good condition.
Frequently Asked Questions
Are sleep sacks safe for babies who can roll over?
Yes, the AAP recommends using sleep sacks once your baby starts showing signs of rolling. Sleep sacks provide a safe alternative to swaddling or using loose blankets in the sleep space once your baby starts to roll. They reduce the risk of suffocation and entanglement, allow freedom of movement, regulate body temperature, and encourage a safe sleep position. Ensure the sleep sack fits properly, select the right TOG (Thermal Overall Grade) rating, and always place your baby on their back to sleep.
How many sleep sacks should I have?
If you plan to use a sleep sack for all your baby's naps and nighttime sleep, it is wise to have at least two. Diaper leaks, spit-up, and drool can quickly make sleep sacks dirty, so having a backup while one is in the wash is convenient. If your baby heavily relies on their sleep sack, having more than two can be beneficial. If you only use it at night or don't mind frequent washing, one sleep sack may suffice until your baby outgrows it.
What is the difference between a sleep sack and a swaddle?
Swaddling is a traditional technique for wrapping babies in blankets to mimic the feeling of being in the womb. It involves folding a small, lightweight swaddle blanket around your baby to keep it cosy and warm while it sleeps. Swaddling has many benefits: It helps your baby feel safe and secure and prevents them from flailing their arms and legs. However, it can be tricky to master, and you should stop swaddling once your baby starts to show signs of rolling, typically around 3 to 4 months. That is when a sleep sack becomes useful. Sleep sacks, or wearable blankets, provide a cosy, blanket-like environment without the risk of tangling or slipping off like a regular blanket. In a sleep sack, your baby's arms can be out (in a sleeveless version) or tucked down (in a swaddle-style sleep sack, suitable only for newborns who have not started rolling). Sleep sacks are easy to put on, eliminate the complexities of swaddling, and are secure. They simplify middle-of-the-night diaper changes without any fancy or complicated wrapping.
What is TOG?
TOG stands for Thermal Overall Grade, a measurement that indicates how much heat a fabric retains. Sleep sacks with a higher TOG are more heavily insulated and designed for cooler temperatures, while those with a lower TOG are lighter and better suited for warmer climates. Many manufacturers provide TOG rating charts to help you determine the appropriate sleep sack for your baby's sleep environment. This ensures your baby remains comfortable and safe without overheating or getting too cold.
How should a sleep sack fit?
You want the sleep sack to fit snugly but not too tight or constrictingly. Be sure to use the correct size guide for your sleep sack. If the sack becomes too tight, limits your child's mobility, or can not fit into the largest size available, it is time to stop using it. Your baby should have enough leg and arm movement room to ensure comfort and safety.