Looking for the best winter sleep sack to keep baby warm and cozy? Here are 10 of my favorites for cold, winter nights.
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I love sleep sacks for keeping baby warm, because they cover baby’s body and legs, while also providing space for movement. They keep baby’s arms free so they can prop themselves up if needed and are safe to use even if baby rolls over in their sleep.
Best Winter Sleep Sacks
I’ve done my research on some of the warmest sleep sacks. Many of these have cult followings, and for good reason.
Kyte Baby
Kyte Baby is beloved by so many parents, and for good reason. These are made from a super soft bamboo rayon material, making them super cozy.
They have double zipper that unzips from the bottom of the sleep sack to make night time diaper changes easy.
Woolino
I love Woolino because they can be used year-round, regardless of season. These are made from merino wool, which is both warm and breathable. The material helps regulate baby’s body temperature, regardless of how hot or cold it is.
The sizing is also universal, so it can fit babies 2 months–2 years. It also has a built-in seat belt slots, making it easy to buckle up baby in the cold.
Baby in a Bag
Baby in a Bag makes a baby sleeping bag that has a 2.5 TOG rating, making it a great option for winter nights.
This sleeping bag is designed to keep baby warm in temperatures as low as 58 degrees, thanks to its cotton inner lining and minky-soft polyester shell. It comes in a range of sizes, all the way up to 3T.
Halo Micro-Fleece Sleep Sack
I used Halo sleep sacks with my daughter, and loved them. I love how affordable they are, and they were also high-quality and long-lasting.
They also have excellent options for prints, colors, and fabric materials (in case you need summer sleep sacks too). They have sizes from newborn all the way to extra-large, which fits a 2 year old up to 40” long.
Baby Deedee
The Baby Deedee Sleep Nest is another great option. It comes in a variety of materials ranging from fleece, cotton, and even a luxurious sherpa.
The Baby Deedee comes in a winter weight (2.5 TOG) with quilted duvet material for an added layer of warmth. This sleep sack has button straps at the shoulder, making it easy to get baby in and out.
Love to Dream
Love to Dream has a unique design to keep baby warm, without overheating.
The thicker fabric on the chest and bottom acts like a wearable blanket to keep baby warm, while the fabric on the sleeves and upper chest is breathable. With a 2.5 TOG Rating, this is one of the warmest sleep sacks.
Gunamuna Wearable Blanket
The Gunamuna wearable blanket is made of bamboo rayon and mimics the warmth of a down comforter.
It’s unique diaper zipper keeps baby warm, even if you need to do a middle of the night diaper change. The top shoulder straps also make changing in and out of this a breeze.
Lictin Sleeping Bag
With a 3.5 TOG rating and removable long sleeves, this Lictin sleeping bag is incredibly warm. This would be good for camping trips with baby or for hanging outside when it’s especially chilly.
Zipadee-Zip
If you’re looking for one with sleeves, look no further than the Zipadee-Zip!
The Zipadee-Zip has a unique starfish-like design, keeping baby’s arms and legs fully enclosed while allowing some space for movement.
It’s a great choice if you’re worried about baby’s arms and hands getting too chilly. And while it’s not the warmest, it can be easily layered over warmer base-layers.
This is also a great transition swaddle for when you’re transitioning baby out of a swaddle. It provides the fully encompassing feeling of a swaddle while allowing movement in your baby’s arms in case they roll over.
Little Sleepies
Similar to Kyte Baby, Little Sleepies are made from an ultra-soft bamboo material called Lunaluxe™. It’s soft and gentle against sensitive baby skin.
Little Sleepies come in winter weights with a higher TOG and internal quilting, which will keep baby warm on winter nights.
These have adjustable shoulder straps and an extra long length to fit baby over several months. They also have sizes ranging up to 36 months. One of the best things about Little Sleepies are the adorable prints they come in. Disney-lovers will be thrilled with the princess and Nightmare Before Christmas themes!
Frequently Asked Questions About Winter Sleep Sacks
What is the Warmest Sleep Sack for Babies?
The Lictin Sleeping Bag is the warmest one I’ve seen, with a 3.5 TOG Rating.
What TOG Is Best For Babies in Winter?
A sleep sack’s TOG Rating. (Thermal Overall Grade) measures the insulation rating of a garment’s material. It lets you know how warm the fabric is on a scale of <1 to 3.5.
The higher the TOG, the warmer the fabric.
When it comes to picking the right TOG rating for a winter sleep sack, first consider the temperature of your baby’s room on a typical winter night.
Popular baby garment manufacturer Aiden + Anais has a super helpful TOG rating chart on their website to help you pick the best TOG based on room temperature.
If your baby’s room is typically less than 68 degrees in winter, consider a sleep sack with a TOG rating of 2.5 or higher.
Are Sleep Sacks Warm Enough for Winter?
While a sleep sack isn’t absolutely necessary, I do recommend it.
Not only will it keep baby warm, it’s also a helpful sleep association to signal that it’s time to sleep. Sleep sacks are a great addition to baby’s bedtime routine and nap routine.
Another great thing about sleep sacks is that they’re a safe alternative to blankets. Babies can’t sleep with a blanket until 12 months old, according to the American Academy of Pediatrics.
Sleep sacks keep baby covered and warm in their crib when they’re too young to safely use loose blankets or bedding.
