Best Sleep Sacks of 2025

Elisa Drew Avatar
Elisa Drew
Last Updated: Jan 16, 2025

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Sleep sacks are a popular choice among parents looking for a safe and comfortable way to keep their babies warm at night. These cozy and lightweight sacks are designed to replace traditional blankets and sheets, which can pose a suffocation risk for infants. Sleep sacks come in a variety of styles, materials, and sizes, and are typically made from soft and breathable fabrics that keep babies comfortable without overheating. They are also easy to use, with simple closures and openings that make diaper changes a breeze. Whether you're looking for a winter-weight sleep sack or a lightweight option for summer, there's a sleep sack out there to meet your baby's needs.

At a Glance: Our Top Picks

Cute Castle Baby Sleep Sack 0-6 Months Cover #TOP 1
Cute Castle Baby Sleep Sack 0-6 Months
ftb score rating icon 9.8
Burt's Bees Baby Beekeeper Blanket Cover #TOP 2
Burt's Bees Baby Beekeeper Blanket
ftb score rating icon 9.7
Love To Dream Swaddle UP Baby Swaddle Cover #TOP 3
Love To Dream Swaddle UP Baby Swaddle
ftb score rating icon 9.5

Top 10 Sleep Sacks

Cute Castle Baby Sleep Sack 0-6 Months

CC-Sleep-Green-S
Green
0-6 Months
Cute Castle Baby Sleep Sack 0-6 Months Cover
Cute Castle Baby Sleep Sack 0-6 Months - Lightweight 100% Cotton 2-Way Zipper TOG 0.5 Infant Wearable Blanket, Newborn Essentials Toddler Sleep Clothes (3 Pack Green)

The Cute Castle Sleep Sack is designed for your baby's comfort and safety. Made from soft 100% cotton, it ensures breathability while keeping your little one warm without overheating. The double zipper makes diaper changes quick and easy, while zipper guards protect delicate skin. With thoughtfully designed openings for arms and neck, it provides a snug fit and allows for movement, promoting a cozy sleep environment. Plus, this value-packed 3-pack comes in gender-neutral colors, so you’ll always have a clean sleep sack ready for bedtime.

What We Like
Soft and breathable material
Convenient 2-way zipper
Great value in a 3-pack
Good for warmer weather
Plenty of leg room
What We Don't Like
Some zipper issues reported
Stitching threads may come loose

Burt's Bees Baby Beekeeper Blanket

LY27422-CLD-XL
X-Large
Burt's Bees Baby Beekeeper Blanket Cover
Burt's Bees Baby Beekeeper Infant Wearable Blanket, 100% Organic Cotton Unisex, Girl, Boy Swaddle Transition Sack - Light Weight 0.5 TOG or Medium Weight 1.5 TOG - Newborn Essentials Sleep Clothes

The Burt's Bees Beekeeper Blanket is crafted from premium organic cotton, ensuring a soft touch on your baby's sensitive skin. Safety is prioritized with a smart design that includes an interior zipper guard, allowing your little one to move freely without risk. The convenient zipper closure opens from the bottom, making late-night diaper changes a breeze. Plus, cleaning is simple with machine wash instructions, so you can keep it fresh effortlessly. This blanket is available in various sizes, catering to babies from newborns to toddlers, ensuring a perfect fit as they grow.

What We Like
Soft and warm material
Beautiful patterns and designs
Good fit and roomy
Easy to wash and dry
Nontoxic fabric quality
What We Don't Like
Occasional zipper difficulty
Some sizes may be large

Love To Dream Swaddle UP Baby Swaddle

16-10101
Gray
Small (8-13 lbs)
Love To Dream Swaddle UP Baby Swaddle Cover
Love to Dream Swaddle UP, Baby Sleep Sack, Self-Soothing Swaddles for Newborns, Improves Sleep, Snug Fit Helps Calm Startle Reflex, New Born Essentials for Baby, Small 8-13lbs, Gray

The Love To Dream Swaddle UP is designed to allow babies to sleep in their preferred ARMS UP position, which is proven to calm the startle reflex and improve sleep quality. The patented wings enable self-soothing by allowing babies to touch their face and suck on their hands, just like they did in the womb. The snug fit of the 4-way stretch fabric also provides a secure feeling like being in the womb, which is perfect for any season as it does not contain harmful chemicals.

What We Like
Easy zip-up feature
Promotes self-soothing
Comfortable and breathable fabric
Prevents escaping swaddles
True to size fit
What We Don't Like
May fit larger for preemies

3-Pack Organic Baby Swaddle Sleep Sacks

KeaBabies
Nordic
One Size
3-Pack Organic Baby Swaddle Sleep Sacks Cover
KeaBabies 3-Pack Organic Baby Swaddle Sleep Sacks - Newborn Swaddle Sack, Ergonomic Baby Swaddles 0-3 Months, Swaddles for Newborns,Baby Sleep Sack, Baby Swaddle Blanket Wrap,Baby Essentials(Nordic)

The 3-Pack Organic Baby Swaddle Sleep Sacks are designed to provide ergonomic support for an infant's healthy hip development. Made with breathable and temperature-regulating ultra-soft Organic Cotton, it is a highly-raved newborn swaddle sack for all seasons. The swaddle wrap is certified safe for use as a baby swaddle blanket, and the smart design allows newborns to fit snugly, providing a soothing environment that mimics the womb. The FabTech 2-way stretch knit makes it extra durable, machine washable, and lasting.

What We Like
Soft, gentle material
Effective for calming babies
Easy to wash and maintain
Good fit for newborns
Cute design options
What We Don't Like
May run small after washing
Velcro can be too strong
#TOP 5

Hudson Baby Unisex Baby Cotton Wearable Sleeping Bag

52105
Foxes
0-3 Months
Hudson Baby Unisex Baby Cotton Wearable Sleeping Bag Cover
Hudson Baby Unisex Baby Cotton Long-Sleeve Wearable Sleeping Bag, Sack, Blanket, Foxes, 0-3 Months

The Hudson Baby Unisex Baby Cotton Long-Sleeve Wearable Sleeping Bag is made with 100% cotton, making it soft, gentle, and comfortable on baby's skin. It features safe sleep long-sleeve wearable blanket sleep sacks and is optimal for everyday use. Customers love the foldover hand mittens, lightweight yet warm material, and the adorable prints. The only downside is that the zipper can be a bit faulty and the sleep sacks run a bit large.

What We Like
Soft and cozy material
Good value for the money
Breathable for summer use
Convenient zipper design
Includes mittens for protection
What We Don't Like
Not suitable for very cold weather
Quality of zipper may vary
#TOP 6

Yoofoss Baby Sleep Sack 0-6 Months

SS-F-036-S
Green&fox&gray
Small
Yoofoss Baby Sleep Sack 0-6 Months Cover
Yoofoss Baby Sleep Sack 0-6 Months Baby Wearable Blanket 100% Cotton 2-Way Zipper Toddler Sleeping Sack, 3 Pack Soft Lightweight Sleep Sacks for Babies

The Yoofoss Sleep Sack is designed to keep your baby cozy and safe while they sleep. Made from 100% organic cotton, it offers a soft and breathable experience, perfect for maintaining a comfortable temperature without overheating. The innovative 2-way zipper allows you to change diapers easily during the night, ensuring minimal disruption. With roomy arm and neck openings, your baby can move freely, promoting healthy hip development. Plus, this 3-pack ensures you always have a clean sleep sack ready for bedtime, making it a practical choice for busy parents.

What We Like
Soft, breathable material
Great quality and value
Efficient double zipper
Cute and fun patterns
Durable after multiple washes
What We Don't Like
Runs slightly big
Limited pattern options
#TOP 7

FIEMOL Baby Sleep Sack 6-12 Months

Cyan
Medium
FIEMOL Baby Sleep Sack 6-12 Months Cover
FIEMOL Baby Sleep Sack 6-12 Months, 100% Cotton Sleeping Sack for Newborn and Infant, 3 Pack Baby Wearable Blanket, 0.5 Tog Lightweight Double Zipper Sleep Bag Cyan

The FIEMOL Baby Sleep Sack is designed with your baby's comfort in mind. Made from 100% premium cotton, it ensures breathability and softness, keeping your little one cozy without overheating. The innovative double zipper allows for easy diaper changes, making nighttime routines simpler for you. With four size options, you can find the perfect fit as your baby grows, and the three-pack offers versatility for different occasions. Safety is prioritized with soft edges around the neck and arms, preventing discomfort while allowing for plenty of kicking room, promoting healthy hip development.

What We Like
Soft and breathable material
100% cotton construction
Sturdy zippers and durable
Good sizing for growth
Great for summer use
What We Don't Like
Not extremely soft
Slight shrinkage after washing

Unnivoll Baby Sleep Sack

SS-UNI-A-002-M
Blue
Medium
Unnivoll Baby Sleep Sack Cover
Unnivoll Baby Sleep Sack 6-12 Months 3 Pack 100% Cotton Lightweight 0.5 TOG Wearable Blanket Baby Sleep Bag with 2-Way Zipper for Newborn Infant Blue

Unnivoll Sleep Sack is a high-quality baby wearable blanket made from 100% combed cotton. It is designed with the safety of your little one in mind, meeting all the guidelines set by the Consumer Product Safety Commission (CPSC). The upgraded process ensures optimal comfort and breathability, allowing your baby to sleep peacefully. The 2-way zipper makes diaper changes quick and easy, without disturbing your baby's sleep. The unique pattern, featuring sky elements like rainbow, star, and planet, promotes brain and visual development. With four size options available, this sleep sack grows with your baby, providing coziness and a safe sleeping environment.

What We Like
Soft and breathable fabric
Convenient double zipper design
Vibrant colors and cute designs
Comfortable for warm climates
Roomy and allows growth
What We Don't Like
Shrinks after washing
May require size up

HALO Micro-Fleece Sleepsack Swaddle

Cream
Newborn (Pack of 1)
HALO Micro-Fleece Sleepsack Swaddle Cover
HALO Micro-Fleece Sleepsack Swaddle, 3-Way Adjustable Wearable Blanket, TOG 3.0, Cream, Newborn, 0-3 Months

The HALO Micro-Fleece Sleepsack Swaddle is a wearable blanket that replaces loose blankets in the crib to create a safer sleep environment for babies. Made with 100% polyester micro-fleece fabric, this swaddle is super-soft and plush inside and out, designed to wick away moisture. The 3-way adjustable swaddle allows for Arms-In to reduce startle reflex, Hands-to-Face for self-soothing, and 1 Or 2 Arms Out for an easy transition from swaddling to the SleepSack. The inverted zipper opens from the bottom for easy diaper changes and the sleeveless design reduces the risk of overheating.

What We Like
Warm and cozy fabric
Easy to use
Versatile swaddling options
Helps baby sleep better
Good for cold weather
What We Don't Like
Loud Velcro during diaper changes
Not breathable in warmer weather
#TOP 10

Yoofoss Baby Sleep Sack 6-12 Months

SS-O-001-M
0.5 Tog-green&fox
Medium
Yoofoss Baby Sleep Sack 6-12 Months Cover
Yoofoss Baby Sleep Sack 6-12 Months Long Sleeve Wearable Blanket Baby 100% Cotton 2-Way Zipper 0.5 Tog Infants Sleeping Sack, Lightweight(Medium)

The Yoofoss Baby Sleep Sack is designed to keep your little one cozy and safe. Made from 100% premium cotton, it ensures comfort for your baby's sensitive skin. The long sleeves come with adjustable mitten cuffs, providing warmth and freedom of movement, perfect for cooler nights. With its convenient 2-way zipper, dressing and diaper changes become hassle-free. The snug neck opening and wide hem allow for easy movement while keeping your baby warm and supporting healthy hip development. This sleep sack is an excellent choice for parents looking for safety and comfort.

What We Like
Soft and cozy material
Good warmth without overheating
Easy to wash and maintain
Double zipper for convenience
Beautiful and cute designs
What We Don't Like
Not suitable for newborns
Size may be larger than expected
Buying Guide Image

Guidelines for Choosing the Right Sleep Sacks for Babies

What are Sleep Sacks?

Sleep sacks are a type of wearable blankets that are designed to keep your baby warm and safe while sleeping. They provide a snug and secure fit and are a great alternative to traditional blankets or sheets, which can be kicked off or tangled up during sleep.

Sleep sacks come in a variety of sizes and styles, so it's important to choose the right one for your baby to ensure they stay warm and comfortable while they sleep. They also come in different fabric materials and weights, depending on the season and the climate in your area.

Types of Sleep Sacks

When it comes to choosing a sleep sack, there are a few different types to consider.

The first type is the traditional sleep sack. These are usually made of cotton, wool, or fleece and are designed to keep your baby warm while they sleep. They also come in a variety of sizes and styles, so you can find one that will fit your baby comfortably.

The second type is the wearable blanket. These are made of lightweight fabrics such as muslin or bamboo and are designed to keep your baby comfortable and warm without being too hot. They are also great for travel and can be easily packed away in a diaper bag.

The third type is the swaddle sack. These are designed to help keep your baby in a swaddle position while they sleep. They are usually made of lightweight fabrics such as muslin or bamboo and are designed to keep your baby comfortable while they sleep.

Factors to Consider When Choosing a Sleep Sack

When choosing a sleep sack, there are a few important factors to consider.

The first is the size. Sleep sacks come in a variety of sizes, so make sure to measure your baby and choose a size that will fit them comfortably.

The second factor is the material. Depending on the season and the climate in your area, you'll want to choose a material that is appropriate for the weather. In colder climates, a heavier material such as wool or fleece may be best, while in warmer climates, a lighter material such as muslin or bamboo may be better.

The third factor is the weight. Sleep sacks come in a variety of weights, so make sure to choose one that is appropriate for your baby. Heavier weights may be better for colder climates, while lighter weights may be better for warmer climates.

Finally, make sure to look for a sleep sack that is breathable and comfortable. Look for one that is made of lightweight fabrics and has an adjustable fit. This will help ensure that your baby is comfortable while they sleep.

Safety Considerations When Choosing a Sleep Sack

When it comes to choosing a sleep sack, safety is an important consideration.

Make sure to look for one that is certified by the International Hip Dysplasia Institute, as this will ensure that it meets safety standards.

Also, make sure to look for one that is made of breathable fabric and is free of any small parts or loose strings that could potentially be hazardous to your baby.

Finally, make sure to follow the instructions that come with the sleep sack and make sure to use it properly.

Final Thoughts

Choosing the right sleep sack for your baby can be a daunting task, but it doesn't have to be. By considering the type, size, material, weight, and safety considerations, you can be sure to choose the right sleep sack for your baby.

Frequently Asked Questions (FAQs)

1. When should babies start wearing sleep sacks?

Babies can start wearing sleep sacks right from birth, although many parents choose to begin with swaddling and then transition to a sleep sack once their baby starts attempting to roll over, usually around 3 or 4 months of age.

2. When should babies stop wearing sleep sacks?

In most cases, it is recommended to continue using a sleep sack until your baby's first birthday. After that, you can safely transition your child to regular bedding options.

3. Do sleep sacks prevent SIDS?

While sleep sacks themselves do not prevent SIDS, they eliminate the risk of suffocation and strangulation associated with loose blankets in the crib, making them a safer sleep option for babies.

4. What are the cons of sleep sacks?

Some potential cons of sleep sacks include not providing the same level of containment as swaddles, which may not soothe the startle reflex in some babies. Additionally, babies who are used to the snug feeling of swaddling may initially find sleep sacks less comforting.

5. Do babies need to wear anything under a sleep sack?

It is recommended for babies to wear breathable fabrics like 100% cotton pajamas or onesies underneath a sleep sack for optimal comfort and safety.

6. Do babies arms get cold in sleeping bags?

Sleep sacks are designed without arms to help regulate baby's body temperature. Babies release heat through their arms and head, so as long as their core is warm, there is generally no need to worry about cooler arms and cold hands.

7. Can my baby sleep in just footie pajamas?

For babies younger than nine months, it is important to ensure they do not become too hot during sleep. A cotton all-in-one sleepsuit with attached feet, commonly known as footie pajamas, is a great option for sleepwear in colder months.

8. Can baby wear sleep sack if rolling over?

Babies should not wear sleep sacks with swaddle attachments or wraps once they start rolling over on their own to avoid the risk of entrapment or suffocation.

9. Can babies overheat in sleep sack?

Overheating is a valid concern when using sleep sacks. Babies can overheat if they are wearing too many clothes, have too much bedding, or if the bedroom is too hot. It's important to monitor the temperature and ensure your baby is not overdressed.

10. Do sleep sacks hinder development?

As long as the sleep sack fits properly, it should not hinder your baby's hip and leg movement or hinder their development. If you have any concerns, it's best to consult with your doctor.

Editor's Notes

During our sleep sack research, we found 24 sleep sack products and shortlisted 10 quality products. We collected and analyzed 356,010 customer reviews through our big data system to write the sleep sacks list. We found that most customers choose sleep sacks with an average price of $23.31.

The sleep sacks are available for purchase. We have researched hundreds of brands and picked the top brands of sleep sacks, including Cute Castle, Burt's Bees Baby, Love to Dream, KeaBabies, Hudson Baby. The seller of top 1 product has received honest feedback from 601 consumers with an average rating of 4.9.

Written by
Elisa Drew Avatar

Elisa Drew is a really professional copywriter specializing in baby products with five years of experience working as a pediatrician once. She has published a series of baby books purchased by over thirty thousand people in the United States.