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Winter Sleep Sacks

As we approach the frosty months in Seattle, the temperature keeps dropping. I don’t know about you, but I am ALWAYS worrying about my baby/toddler being warm enough at night. Warm winter sleep sacks to the rescue!

Especially for those of us that have cold nights and older, drafty homes – ACK

Below are a few of my favorite winter weight wearable blankets to take you through the fall and chilly cold winter (priced lowest to highest). See also: “regular” wearable blankets, or sleep sacks.

Note that these are designated with a “TOG factor,” which denotes the level of thermal insulation used in the textile trade. They range from 0.5 to 3, with 3 being the warmest.

Here are our fave winter sleep sacks to keep baby cozy and comfy all winter long.

Halo Winter Weight Sleepsack ~ $54

Winter Sleep Sack - Halo
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My babes have worn HALO since birth, so I’m a big fan. Out of all the HALO swaddles and sleepsacks I’ve purchased, their “winter weight” sack is my fave. It’s their heaviest weight (TOG 2.5), made of super soft cotton, (doesn’t pill after washes) and has a comfy quilted interior. My only qualm is that I wish the sizing went through 24 months; we are bummed we’ve grown out of ours!

Related: Best Kid’s Snow Boots

Hanna Andersson Wearable Blanket ~ $54

Winter sleep sack
best organic crib mattress

In the midst of my search for a winter sleep sack, I discovered this gem from Hanna Andersson! Available in grey, cream and red. Not only is this sack gorgeous, but it’s amazing for climates where it gets freakin’ COLD. The outside is a quilted cotton and the zipper conveniently runs downward. Who wouldn’t want to sleep in a bundle of sherpa fleece?!

Baby Deedee Sleep Nest Teddy ~ $42 – Top Pick

Winter sleep sack - baby deedee
best organic crib mattress

Full disclosure: I received the Sleep Nest Teddy as a gift from Baby Deedee, and thank goodness I did. At ABC Kids Expo in October, I mentioned I was rounding up winter sleep sacks for our readers and they said I HAD to try the Teddy. They were so right!

I love the shoulder snap openings the sleep nest is known for and the over-sized, dual-entry zipper. The best part is that I have washed it countless times at this point and the fleece is still lovely and plush. This is my current fave for my 1-year-old — he sleeps so well in this cozy sack (TOG Factor 2.5).

Gunapod® Bamboo Duvet Sack ~ $49 – Most like an actual duvet!

Winter sleep sack - Gunapod
best organic crib mattress

This versatile sack has features we’ve all thought about during a middle of the night diaper change. It literally unzips across the entire bottom of the sack for complete open access. SO GOOD!

This sack is definitely made for cooler climates (2.6 TOG), but the breathable bamboo fibers are also temperature regulating and moisture wicking to help prevent overheating. You can also choose to leave the bottom zippers a bit open to allow extra airflow if you wish.

File this under, “why can’t I get one in my own size?” This sack is awesome and very highly rated. Best of all, it goes up to 36 months, which is a size that can be hard to find.

Kip & Co. Sleep Bags ~ $55

Winter sleep sack - Kip & Co
best organic crib mattress

New(ish) from Australia, we came across Kip & Co. at the ABC Kids Expo. I walked by their booth and stopped dead in my tracks: gorgeous!

I love the vibrant colors they use in their designs (they basically inspired me to re-decorate my home, but that’s another story!) and I LOVE their thick, winter weight sleep sack (TOG factor 2.5). Their prints are beautifully bright and the sizing will take you far. My personal fave feature: the arm openings have a snap to adjust for snugness as baby grows. Brilliant!

The Woolino – ~$119

winter sleep sacks -- woolino
best organic crib mattress

Merino wool is a natural fiber, so it’s super breathable, absorbs moisture, and is naturally fire resistant. And soft! OMG — it’s so soft. The Woolino is made from premium hypoallergenic Australian merino wool. This one-size product fits babes 2 mos – 2 yrs, so your babe won’t outgrow it until 2 years of age. In other words, yes, it is pricey, but it will last you a while (even a lifetime — as it is meant to be handed down from child to child, even generations).

It has shoulder snaps and an inverted side zipper for easy changing and seat belt slots for easy transfer from crib to car.

Carter’s Baby Fleece Sleep Bag ~ starting at $9.99

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This fleece sleep back is super warm and has sleeves for extra warmth on the chillest nights. It is soft and cozy, but isn’t too heavy, so you wouldn’t have to worry about overheating.

See also Wearable Blanket Smackdown


  1. Avatar

    I love all your recommendations but my husband was dead set on getting a down filled sleep sack (he’s Canadian so anything to do with cold is automatically fixed with large amounts of down). So we searched high and low and found a wonderful down sleep sack from milk and honey co. I promise I am in no way affiliated with them, I just really like their product. The shell is cotton, the fill is plush and lovely, the snaps and zippers are cleverly situated to grow with baby and keep the down away from her face even on her twistiest nights. Last but not least, it keeps her warm! We have an old house so the insulation needs updating and it can get very very cold at night, even with space heaters. I do not worry about her getting cold with this also sack and she sleeps comfortably all night (she is 6 mos). Anyway, I think it would make a great addition to the winter also sack lineup you have here. https://themilkandhoneyco.com/

    1. Avatar

      Thank you for this comment/recommendation!! I’m going to be in a house that’s too cold for a 2.5 tog and a down sleep sack seems a good alternative! The Hanna Anderson one above seems like it could be good too, but I can’t find a tog rating for it anywhere

      1. Melissa Kresser

        Unfortunately, we couldn’t find any info on TOG ratings from HA either. Best of luck to you in your search!

    2. Avatar

      We have two Milk & Honey sleeping sacks (got them in used condition really not knowing much about them). And they are sooooooo nice! I can’t stress enough how fluffy and cozy they are. I like that they adjust and will last a while. We also have a Woolino sack (also bought used) and we like that one as well. Preced well and it is really a sack that can be used year round (unless you live in a super hot state).

  2. Avatar

    The Gunapod fill is polyester. I was very disappointed to discover this the first time i put it in the wash. Only the shell is bamboo, and it’s a bamboo/rayon mix.

    1. Melissa Kresser

      Hi Jordan! I’m sorry you had a disappointing experience 🙁 I also have a gunapod and wash it in the machine and dryer too, I haven’t had any issues. I reached out to the company for further explanation. They informed me that the outside fabric is bamboo viscose/spandex. The bamboo breathes, wicks moisture and is thermal regulating. The fill is premium hi-loft hypoallergenic polyester, which is loosely woven to not interfere with the bamboo benefits. P.s. our recommendations are never sponsored, they are completely our own, or reader recos.

    1. Melissa Kresser

      Hi Kathleen! Most wearable blankets don’t come with sleeves to prevent overheating. We just put our babies in a warm long sleeve pajama underneath. That said, you can definitely find brands that make a sack with arms. We haven’t reviewed those here but this one seems to have good reviews: https://www.amazon.com/dp/B01MDJ9WML/?tag=lucslis-20 and I’ve seen some at Carters.

  3. Avatar

    So torn between the Baby Deedee Sleep Nest and the Teddy…they seem really similar in many ways (snaps at the top, big zipper, tog 2.5), except for the quilted vs fleecy outer material.
    So, which do you think is better?

    1. Kristen Toshner

      Hi Sarah! Both are pretty similar as you mentioned. I personally love the Teddy as Baby Deedee’s fleece is a really nice quality. It washes really nicely and stays super plush. – Kristen

  4. Avatar

    Would these be considered to be warmer than merino wool sleep sacks? Trying to decide if I need to upgrade for winter!

    1. Melissa Kresser

      Hi Kate! Great question, all merino wool products have a different TOG, you’ll have to reference the manufacturer when you’ve decided on a product. For reference, the sleep sacks mentioned in this article are around a 2.5 rating. Unless your baby’s room drops below 15 degrees F, you shouldn’t need to go above a 2.5.

  5. Avatar

    We needed something warmer (little guy was always chilly, and we keep our house cooler), and this 3.5 tog Ergo Pouch sleepsack is fantastic! Double zipper, stretchy sides, and organic cotton (no polyester, which is plastic, which is bad for breathability and the environment).

    1. Avatar

      I want to second this recommendation. We also love our ergoPouch 3.5 tog! It has thick knit organic cotton sleeves, so something to cover the arms, but not as thick as the rest of the sleep sack. The pouch part converts into pants for babies that are standing/walking or for use in a stroller. They come in a range of sizes up to 6 years! We got one last winter season after extensive online research and got the next size up this year. They also come in lighter weights: 1.0 tog and 2.5 tog. We also have the Hanna Andersson sleep sack mentioned in this review. It’s great too, but we use it for the more temperate spring and fall months.

  6. Avatar

    Thanks for the article! What about older toddlers? They all say up to 24 months but my almost 3 year old boy won’t keep a blanket on and I’m always concerned his regular Halo cotton sacks aren’t warm enough.

    1. Melissa Kresser

      Hi Erika! I have this same problem. However, I find that the Halo fleece sleep sacks are just fine (they are TOG 1) along with warmer pajamas underneath. For sizing, make sure to go off of weight, not months. That said, Halo also makes a “Big Kids” size (up to 5T). And depending on how cold your house is, remember that kids sleep much better when it’s cooler (65ish).

  7. Avatar

    We have two Milk & Honey sleeping sacks (got them in used condition really not knowing much about them). And they are sooooooo nice! I can’t stress enough how fluffy and cozy they are. I like that they adjust and will last a while. We also have a Woolino sack (also bought used) and we like that one as well. Priced well and it is really a sack that can be used year round (unless you live in a super hot state).

  8. Avatar

    For the older baby girls, a reversible Print Jacket in a gorgeous pink colour is offered by Zutano, to keep them toasty warm. It doubles as a coat for different occasions with a pink floral print, or if you turn on its reverse side you get a print in seersucker stripes, and is made up of 100% cotton. Sizes are from 24 months to 5 Year Olds, and Zutano price this at $48.95.

  9. Avatar

    I am looking for some winter sacks for my baby and after some internet searches I discovered about CuteRascals and planning to purchase this sack from there but actually, as of now after landing up at Lucie’s list I am getting confused whether to buy it from here or CuteRascals since they both almost have the same price. Can anyone help me in deciding which product has the best quality?

    1. Melissa Kresser

      At Lucie’s List, we review products and provide links to purchase the products. We are not a retailer. We are unbiased – so you know that you are getting our honest opinion from personal experience and other reader recommendations. Where you buy is up to you, however, we appreciate the small commission we make from a sale through clicking on one of our links 🙂

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