But one often-overlooked factor is the temperature the sleepwear will keep your baby at. Sure, soft fabrics and vibrant patterns might be alluring, but if you’re shopping for a sleepwear set you will likely be using for several months, you’ll want to make sure it will keep your baby warm enough.
So we rounded up our best baby sleepwear to help you find the right fit for your baby.
Our Editor’s Best Baby Sleep Sacks For Winter Reviews
baby deedee Sleep Nest Teddy Sleeping Bag, Ivory, (Medium 6-18 Months)

Key Features:
-
The Cozy Sleep Nest Baby Sleeping Sack is a comfortable and breathable sleep sack designed to help your baby sleep through the night. The cocoon shape of the sack provides a sense of security and comfort, while the breathable fabric helps to regulate your baby’s body temperature.
-
This baby sleep sack is made of high quality materials, including sherpa faux fur and premium Indian cotton. It is designed to keep your baby warm and comfortable during the winter months.
-
The baby sleep sack has exclusive shoulder straps that make it easy to place a sleeping or standing baby in the sleep nest. The high-quality reverse zipper makes it easy to get the baby in and out of the sack.
-
This baby sleep sack is extra soft and comfortable, quilted for an extra layer of warmth, with a TOG rating of 2.5. It is recommended for use in rooms with a temperature of 64-74°F.
-
This baby sleep sack is made for winter weather and is easy to care for – simply machine wash and tumble dry on low heat.
Baby Sleeping Bag Sack – Easy Care Premium Polar Fleece, Wearable Blanket – Boys & Girls. Fits Infants, With Convenient Shoulder Straps for Safe & Comfortable Sleep, Navy, Medium (6-18 Months)

Key Features:
-
If you are looking for a baby sleep sack that will keep your baby warm in the winter, this is the perfect option. The cocoon shape of the sack promotes sleep and is a great substitute for a swaddle. The transition from swaddle to sleep sack will be seamless for your baby.
-
This baby sleep sack is perfect for winter, because it has exclusive shoulder straps that make it easy to place a sleeping or standing baby in the sleep nest. The high-quality reverse zipper keeps the baby warm and snug.
-
If you are looking for a high quality, comfortable sleep sack for your baby or toddler, this is the product for you. It is made from 100% soft premium Polar fleece and is mid-weight, TOG 1.2.
-
The baby sleep sack is a wearable blanket that is safe for babies to use. It is an alternative to a loose blanket and it keeps the baby warm and comfortable all night long. It is perfect for use all year round.
-
This baby sleep sack is designed to be easy to care for, with a machine-washable design and the ability to be tumble dried on low heat. It comes in universal sizes to fit boys, girls, newborns, and all ages up to 36 months, and is available in a variety of colors.
BABYINABAG Warm Quilted Winter Model Baby Sleeping Bag and Sack, Plush Minky Dot, 2.5 Togs for Infants and Toddlers (Medium (10 – 24 mos))

Key Features:
-
This baby sleep sack is for winter and is available in small, medium, and large sizes. It is recommended to swaddle your infant for the first 2 to 3 months or when they start to roll.
-
This baby sleep sack is safe for babies to sleep in because it is sleeveless and therefore will not overheat them. The sack is also adjustable so that it can grow with the baby.
-
This is a high quality baby sleep sack for winter, made with a Minky Dot outer shell and 100% Jersey cotton inner lining. It has high quality YKK snaps and zippers, and is designed for room temperatures below 70 degrees Fahrenheit. Please follow the sizing chart when choosing a size – the large size will not fit unless your toddler is at least 24 months old.
-
The baby sleep sack is designed to keep your baby warm during the winter months. It is spacious and practical, with a generous bell shape that allows ample room for kicking. The front zipper makes it easy to change diapers. It is machine washable and can be tumble dried on low heat.
-
These are baby sleep sacks for winter that are very warm with a soft polyester filling for more warmth. They are recommended for nursery temperatures between 58F to 69F. They surround the baby, providing insulation from both below and above, and also a warm pocket of air around the baby.
Baby Deedee Sleep Nest Sleeping Sack, Warm Baby Sleeping Bag fits Newborns and Infants,Medium (6-18 Months)

Key Features:
-
If you are looking for a safe and cozy sleep sack for your baby this winter, this is the one for you. The breathable fabric and comforting cocoon shape will help your little one sleep soundly all night long.
-
This sleep sack is for winter and has unique shoulder straps that make it easy to place a sleeping or standing baby in the sleep nest. The filling is 100 percent polyester.
-
The exterior of this sleep sack is made from 100% cotton, and the interior is soft and quilted for extra warmth. This sleep sack is perfect for keeping your baby warm during the winter months.
-
These are baby sleep sacks for winter that are made with quilted duvet material and an extra layer of warmth. They have a TOG rating of 2.5 and are recommended for use in rooms with a temperature of 64-74 degrees Fahrenheit.
-
The baby sleep sack is made to be machine washed cold inside out with like colors. You should not bleach the sleep sack, and you should tumble dry it on low. You also should not dry clean the sleep sack.
baby deedee Sleeping Sack, Baby Wearable Blanket Sleeping Bag, Sleep Nest Tee, Newborn and Infants, Lucky Trunks, Medium (6-18 Months)

Key Features:
-
The baby sleep sack is made from a breathable fabric and has a cocoon shape to help baby sleep through the night.
-
These are super cute printed wearable blankets that are made with a 100% cotton shell and a soft quilted interior. They are perfect for keeping your baby warm and cozy all winter long!
-
The shopper is looking at a baby sleep sack for winter. The sleep sack is made from quilted duvet material and has an extra layer of warmth. It has a TOG rating of 2.5 and is recommended for use in a room with a temperature of 64-74 degrees Fahrenheit.
-
This baby sleep sack has exclusive shoulder straps that make it easy to place a sleeping or standing baby in the sleep nest. It also has a high-quality reverse zipper.
-
These baby sleep sacks are perfect for winter because they are made from a soft, warm fabric and they are machine washable and can be tumble dried on low heat.
RESTCLOUD Baby Sleep Bag with Feet Winter, Wearable Blanket with Legs, Sack for Toddler Thicken 2.5 TOG (2T-4T Year, Large) Blue

Key Features:
-
This baby sleep sack is made of organic cotton and is safe and comfortable. It is certificated by Oeko-tex Standard 100.
-
The open legs design on this baby sleep sack for winter is perfect for a mobile child or toddler. It allows them to move around freely while keeping them warm and snug.
-
This baby sleep sack has three zippers that allow you to easily dress and change your baby’s diaper. The high quality YKK zippers are durable and won’t break.
-
This sleep sack is for a toddler and is 2.5 tog, which is suitable for room temperatures of 64°F to 70°F. It has long sleeves to keep the child warm.
-
This baby sleep sack is for a larger baby who is between 2-4 years old. It will keep them warm and is the perfect size for them.
Baby Wearable Blanket, Cotton Sleep Sacks for 0-6 Months, 2 Pack Unisex Sleeping Bag Sack, Small Size, 2-Way Zipper, 0.5 Tog Breathable Cotton (Grey, Small)

Key Features:
-
The baby sleep sack is designed to be ultra soft, stain resistant, and easy to wash. It is also designed to let you all sleep better at night.
-
This is a baby sleep sack for winter that has a 2 way zipper that allows you to change diapers without undressing baby. The baby sleep sack also has a zipper protector that is double thick and reinforced to prevent scratching babies jaw, neck, hands and belly.
-
This baby sleep sack is made from 100% pure cotton and is a .5 TOG count, making it a wearable blanket that is ideal for babies with porous, sensitive skin. It can be worn alone in hotter months or paired with warmer jammies in colder months.
-
This product is a baby sleep sack that is supposed to help babies sleep better and longer. It is made to be comfortable for babies and has a built in blanket.
-
The Bublo Baby baby sleep sack is a soft, safe, and long-lasting sleeping bag for babies and toddlers. It is guaranteed to last for 12 months or the company will refund the purchase.
Nested Bean Zen Sack Winter – Gently Weighted Sleep Sack | Baby: 6-15M | TOG 2.5 | Helps transition from Swaddle | Cotton 100%

Key Features:
-
The baby sleep sack is a weighted blanket that helps babies self-soothe and sleep through the night. It is made to mimic the pressure your baby feels when held by you. Parents report longer sleep in 1-3 nights.
-
The Zen Sack is a baby sleep sack that is designed to help babies sleep through the night. The sack is made from a soft, breathable material that is safe for babies to sleep in. The sack is adjustable to fit babies of all shapes and sizes, and has a developmental stage setting that can be used as babies grow.
-
This is a baby sleep sack for winter that is made from 100% cotton and poly-fiber filling. It has a TOG rating of 2.5 which makes it perfect for cooler climate.
-
The baby sleep sack is a wearable blanket with adjustable shoulder snaps that grows with the baby. It has a 2-way zipper system that allows easy diaper changes. It is safe for all sleep types (back/side/tummy sleepers).
-
The Zen Sack is a baby sleep sack that is guaranteed to satisfy the customer. If the customer is dissatisfied for any reason, they can contact the company for customized tips to help them.
BABYINABAG Very Warm, 2.5 Tog Quilted Winter Model Baby Sleeping Bag and Sack, Plush Minky Dot for Infants and Toddlers (Medium (10-24 mos))

Key Features:
-
These baby sleep sacks are for winter and are sized according to the length of your baby. They are recommended for infants 2-3 months old or when they start to roll.
-
The baby sleep sack is sleeveless to help with heat loss and air circulation. The baby’s arms are also able to move freely inside the sleep sack. The sleep sack is adjustable to fit babies from 3-11, 10-24, and 24-3T months.
-
This is a high quality baby sleep sack for winter, made with a Minky Dot outer shell and 100% Jersey cotton inner lining. It has high quality YKK snaps and zippers, and a 2.5 Tog rating for warmth. Please follow the sizing chart when choosing a size – the large size will not fit unless your toddler is at least 24 months old.
-
This sleep sack is designed to keep your baby warm during the winter months. It is spacious and practical, with a generous bell shape that allows plenty of room for kicking but cannot be kicked off. The front zipper makes it easy to change diapers. It is machine washable and can be tumble dried on low heat.
-
The shopper should be aware that this is a very warm winter model that is recommended for colder temperatures. It has a soft polyester filling that will provide more warmth and a baby sleeping bag that will surround the baby and provide insulation from both below and above.
baby deedee Sleep Nest Travel Quilted Baby Sleeping Bag Sack with Sleeves, Gray Skies, Large (18-36 Months)

Key Features:
-
The baby sleep sack is for winter and can be used both indoors and outdoors. It is made to be easily transportable so you can take it with you on the go.
-
This is a baby sleep sack that is designed to be used with a stroller. It has a slit that allows you to thread the stroller’s buckle through, so you don’t have to wake up your baby when you’re putting them in the stroller. It also has a three-point harness to keep your baby secure.
-
If you’re looking for a baby sleep sack that will keep your child warm and cozy during winter camping trips, this is the perfect option! The water resistant material will protect them from the elements, and they’ll be able to join you in all of your adventures!
-
This baby sleep sack has removable sleeves and snaps at the shoulder for easy removal and placement.
-
The baby sleep sack is made from a premium, ultra-lightweight duvet material that is rated for a TOG rating of 3.5. This is the perfect solution for those who need extra warmth, whether in the house or when traveling.
-
These baby sleep sacks are for winter and are available in large size for 18-36 months old, 31-39 inches tall, and 25-35 lb weight.
Baby Sleep Sacks For Winter FAQs
1. How can I keep my baby warm in a sleep sack during winter?
If you are using a sleep sack that is meant for winter, it will likely have a built-in layer to help keep your baby warm. However, you can also use a sleep sack with a separate blanket over the top to help increase the warmth.
2. Is it safe to use a sleep sack for my baby during winter?
Sleep sacks are a safe option for babies during the winter, as long as you take a few precautions. Make sure the sleep sack is the proper size for your baby, and that it is not too big or too small. Also, make sure the sleep sack is well-insulated and that the fabric is breathable.
3. What are the benefits of using a sleep sack for my baby during winter?
There are many benefits to using a sleep sack for your baby during winter. It helps to keep your baby warm and toasty, and it also helps to protect your baby from the cold. Additionally, a sleep sack can help to prevent your baby from waking up during the night.
4. How can I ensure my baby is comfortable in a sleep sack during winter?
You can ensure your baby is comfortable in a sleep sack during winter by buying a sleep sack that is rated for winter weather and by dressing your baby in warm clothing underneath the sleep sack.
5. What are the best sleep sacks for winter?
There is no definitive answer to this question as different people have different preferences. Some people may prefer a thicker, warmer sleep sack for winter, while others may prefer a lighter weight sleep sack that can be layered with other clothing for warmth. Some other factors that may affect your decision include the temperature range you will be sleeping in, whether you will be using a sleeping bag or not, and whether you have any other medical conditions that require special consideration.
Conclusion
There are many great baby sleep sacks for winter on the market. Our list of the best baby sleep sacks for winter will help you save time researching and choosing the best one for you.