7 Best Sleep Sacks Tested and Reviewed by Parents

While past generations used simple clothes for swaddling, today’s sleep sacks make it much easier. If traditional swaddling feels overwhelming or you need a hassle-free option for late-night changes, a sleep sack offers the same cosy security to help your baby sleep peacefully.

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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 how crucial sleep is, so we have researched and compiled the best baby sleep sacks to add to your newborn checklist.

Here's a Sneak Peek of our Best

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, allowing your baby’s arms to be free once they start rolling is essential. If a baby rolls onto its stomach and its arms are confined inside a sleep sack or swaddle, they 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.

ID: bestone

Best Overall Sleepsack

Halo Sleepsack Wearable Blanket

Best Overall Sleepsack
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Why we like it

  • 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.

Material: 100% cotton, micro-fleece, 100% cotton muslin 

Size range: Small (0-6 months), medium (6-12 months), large (12-18 months), Extra Large (18-24 months)

Care instructions: Machine wash

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 ilama print, and the large size they chose 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 near-nightly use for three months with no issues at all.” The metal zipper makes diaper changes a breeze, and she found that it repels stains remarkably well. Overall, both moms expressed their satisfaction, saying they would buy another sleep sack without hesitation!

ID: besttwo

Best Newborn Sleepsack

Halo Sleepsack Swaddle

Best Newborn Sleepsack
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Why we like it

  • Versatile with three different ways to use
  • Convenient for diaper changes

Something to Note

  • Velcro flaps may lose their shape over time

Material: 100% cotton, micro-fleece, 100% cotton muslin 

Size range: Preemie (1-5 lbs), Newborn (6-12 lbs), Small (13-18 lbs)

Care instructions: Machine wash

Customer’s Review

Customer Review

One mom could not contain her excitement as she shared her love for this sleep sack, proclaiming, “This sleepsack is the best!” She raved about how wonderfully her baby sleeps in it, highlighting that it is not too long, which prevents it from getting in the way during those late-night and early-morning diaper changes—something 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, which 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 emphasized how convenient the design is overall.

A mom living in a hot climate shared her experience, saying, “Our AC is set to 72°F with PJs underneath, and he stays at the perfect temperature.” She also appreciated how easy it is to wash and dry, offering a friendly reminder to close the Velcro wrap part before tossing it in the wash, or it will stick to everything else.

Together, these moms highlight just how much this sleep sack has made a positive impact on their little ones’ sleep and their own nighttime routines!

ID: bestthree

Best Organic Cotton Sleepsack

Burt's Bees Baby Unisex Unisex-Baby Beekeeper Wearable Blanket

Best Organic Cotton Sleepsack
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Why we like it

  • Provides extra coverage for chilly nights, crafted from soft organic cotton.
  • Available in a variety of colours and patterns

Something to Note

  • Zipper only operates in a downward direction.

Material: Organic cotton

Size range: Small (0-6M), medium (6-12M), large (12-18M), extra large (18-24M)

Care instructions: Machine wash

Customer’s Review

Customer 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 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.

Many moms love gifting these sleep sacks, and one shared, “We have continued to buy these for friends and family when they are having babies. They make the perfect gift because of their quality and ease of use. Everyone loves them!”

Together, these moms highlight just how practical and beloved Burt’s Bees sleep sacks are, making them a staple in their parenting journeys and a favorite gift for new parents!

ID: bestfour

Best Splurge Sleepsack

Woolino Four-Season Ultimate Baby Sleep Sack

Best Splurge Sleepsack
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$109

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Why we like it

  • Great temperature regulating properties, long lifespan, roomy design
  • Merino wool regulates the baby's temperature
  • One-size-fits-all design

Something to Note

  • Expensive, might appear quite large on newborns

Material: 100% Merino wool  lining, 100% organic cotton

Size range: Small (0-6M), medium (6-12M), large (12-18M), extra large (18-24M)

Care instructions: Machine wash

Customer’s Review

Customer 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 wasn’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 really does win out in the end.

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!

ID: bestfive

Best Sleepsack For Toddlers and Older Babies

Tealbee Dreamsuit

Best Sleepsack For Toddlers and Older Babies
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Why we like it

  • 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

Material: 70% of bamboo rayon and 30% organic cotton

Size range: 12 months to 4 years

Care instructions: Machine wash

Customer’s Review

Customer Review

One mom shared her delight over these sleep sacks, saying, “I actually 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 it was still in amazing shape.” When she spotted a new brushed print design, she could not resist grabbing a backup. “It is even cuter in person, and so soft! Plus, it keeps him warm at night, which is perfect since we keep our room on the cooler side. 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 wasn’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 just how much comfort these sleep sacks bring to both baby and parent.

These heartfelt reviews highlight the durability, warmth, and comfort of these sleep sacks, making them a must-have for any parent looking to keep their little ones snug throughout the night.

ID: bestsix

Best Spacious Sleepsack

Baby Deedee Sleep Nest Warm Baby Sleeping Bag

Best Spacious Sleepsack
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Why we like it

  • 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.

Material: 100% Cotton Shell,100% Polyester filling

Size range: 0-6 months, 6-18 months, 18-26 months

Care instructions: Machine wash

Customer’s Review

Customer 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 old. 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.

ID: bestseven

Softest Baby Sleepsack

Copper Pearl Sleep Sack

Softest Baby Sleepsack
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Why we like it

  • 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.

Material: Polyester, Rayon

Size range: 0-6 months, 6-12 months

Care instructions: Machine wash

Customer’s Review

Customer Review: One mom shared her excitement about the Copper Pearl sleep sack, sharing, “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—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 proved to be just as soft and stretchy, continuing to be the go-to for every bedtime.

Another mom echoed the sentiment, saying, “This sleep sack is exactly what I was looking for. It is perfect for my almost 5-month-old.” She praised Copper Pearl for its 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, emphasizing the sleep sack’s reliability for parents seeking comfort and security for their little ones.

With glowing reviews like these, Copper Pearl sleep sacks seem to be a favorite among moms who value softness, stretch, and peace of mind for their babies’ sleep.

ID: besteight

Best Sleepsack For Summer

Kyte Baby Unisex Sleep Bamboo Sleeping Bag

Best Sleepsack For Summer
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Why we like it

  • Ultra soft material
  • Silky, lightweight fabric perfect for warmer nights

Something to Note

  • Quite expensive than others

Material: 97% bamboo viscose and 3% spandex

Size range: 0-6 months, 6-12 months, 12-18 months

Care instructions: Machine wash

Customer’s Review

Customer 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 really impressed her, as did the practicality. Another parent chimed in, mentioning how perfect the sleep sack is for travel—it 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 one has been super durable, zipping up with ease. She especially loved the bottom zipper, which makes late-night diaper changes a breeze. Her recommendation? “Everyone should get one!”

With these glowing reviews, it is clear that Kyte Baby sleep sacks offer comfort, convenience, and durability, making them a favorite among parents who want their babies to sleep well in any season.

What to Look Out for While Shopping for Sleep Sacks

When choosing a sleep sack for your baby, several factors must be considered to ensure their safety and comfort. Here are key points to keep in mind.

  1. 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.
  2. 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.
  3. 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.
  4. 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 that can roll over? +

How many sleep sacks should I have? +

What is the difference between a sleep sack and a swaddle? +

What is TOG? +

How should a sleep sack fit? +

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