Sleeping Bag Buying Guide: How to Choose the Right One for Camping
REI Co-op Frostbreak 5 Sleeping Bag
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Camping at the trailhead for an early start, or sleeping in the parking lot to be first on the ski lift, stretch out and enjoy the relaxed fit and warmth of the REI Co-op Frostbreak 5 sleeping bag.
Shop similar productsKey Details
Fill
Synthetic
Temperature Rating (F)
5 degrees (F)
- Recycled polyester shell is treated with a durable water repellent (DWR) finish that resists stains and moisture
- 4 layers of water-resistant synthetic fill insulate against the cold, even when conditions are damp
- Offset quilt construction provides even coverage and minimizes the formation of cold spots
- Relaxed mummy shape provides plenty of room to move while you sleep
- Face muffler and full draft tube keep cold air out of your bag
- Exterior stash pocket
- Differentiated draw cords (1 round, 1 flat) let you adjust the hood and neck easily, whether it's the middle of the day or dark out
- Stuff sack included
- REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world
- Contains materials that meet the bluesign® criteria
Imported.
View all REI Co-op Camping Sleeping Bags| Best Use | Camping |
|---|---|
| Temperature Rating (F) | 5 degrees (F) |
| Temperature Rating (C) | -15 degrees (C) |
| Shell | Recycled polyester (bluesign approved) |
| Zipper Location | Left |
| Insulation Type | Synthetic |
| Fill | Synthetic |
| Sleeping Capacity | 1-person |
| Lining | Polyester |
| Sleeping Bag Shape | Mummy |
| Stuff Sack Size | 11.5 x 23 inches |
| Gender | Unisex |
| Sustainability | Contains materials that meet the bluesign® criteria Contains recycled materials From a Climate Label Certified brand |
Buying Advice
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.
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Most Helpful Favorable Review
I’m NOT Testing To 5°
Shem I3 years ago
Tested this bag in ~30° night temps and that’s as low as she’ll go captain! I had a beanie, a hoody, long sleeve t-shirt, tank top, heavy duty sweatpants, long johns and finally cotton socks topped with wool socks. I also had a tarp (I’ll often sleep under a tarp rather than set up a tent when backpacking) over myself and my mini-cot to avert morning dew and help retain heat. Know what? I think you’d be likely to freeze to death if you tried sleeping in this bag in 5° weather. These bag manufacturers need to think about the liability of claims such as 5°. What if some poor soul went into the back country thinking this bag would get them through the night at that temp? What if they couldn’t start a fire or had no further clothing / blanketing material? It’s a comfortable and fluffy bag and seems decently built, but I’m on the fence as to whether I should return it or use it gently and then donate it to my houseless sister.
Shem I
Boise, ID
58 people found this review helpful
Most Helpful Critical Review
I’m NOT Testing To 5°
Shem I3 years ago
Tested this bag in ~30° night temps and that’s as low as she’ll go captain! I had a beanie, a hoody, long sleeve t-shirt, tank top, heavy duty sweatpants, long johns and finally cotton socks topped with wool socks. I also had a tarp (I’ll often sleep under a tarp rather than set up a tent when backpacking) over myself and my mini-cot to avert morning dew and help retain heat. Know what? I think you’d be likely to freeze to death if you tried sleeping in this bag in 5° weather. These bag manufacturers need to think about the liability of claims such as 5°. What if some poor soul went into the back country thinking this bag would get them through the night at that temp? What if they couldn’t start a fire or had no further clothing / blanketing material? It’s a comfortable and fluffy bag and seems decently built, but I’m on the fence as to whether I should return it or use it gently and then donate it to my houseless sister.
Shem I
Boise, ID
58 people found this review helpful
Customer Images
Treehugger3
Ohio
Big and cozy
4 years ago
I needed a thicker sleeping bag for late fall/winter/early spring camping and this has done the trick. I’ve only used it a few times (with minimum temperatures around 25*F) but it seems to be exactly what I needed. It packs quite large, so I recommend it for car camping only. The zipper gets caught occasionally but is an easy fix when it happens. Overall, this bag is super cozy and I am content with this purchase.
Age:25–34
Weight:150–175 lbs.
Height:5'8"
Yes , I recommend this product
Hiker
Warmish, bulky, terrible zipper
2 years ago
Big and Bulky. Kept me warm in 40' weather but had to layer with a down rumple goose down to stay super cozy on top of fleece layers with a hat. Do not use if backpacking to a site. I got the regular length. At 5'3 it kept me cozy. Huge downside. I hate the zipper. It is impossible to zip up from inside my sleeping bag. A 4am necessary break turns into a disaster when I try to zip up. The fabric along the zipper is extra and catches in the zipper. Stop. Unwind. Zip, stuck again repeat. The only flawless way is if you're outside the bag and able to go straight on. Otherwise from an inside angle, catch, snag, repeat. Sigh.
Height:5'3"
Anna
Scout Approved, Polar Patch Earned
2 years ago
My son took this sleeping bag to his winter Camporee for Boy Scouts. There’s a patch you can earn for camping in 32° or lower temperatures. The temperature reached 25° during one of their nights. I asked him how he slept and if the bag kept him warm and he said it worked great! He slept all night without waking, stayed warm, and appreciated the casual mummy style. He also said the thickness added a little extra smoosh. This is a bulky bag, but we specifically bought it for basecamp-type camping in cold weather. My ONLY quarrel is that the draw string on the carrying sack doesn’t hold its place very well so it comes loose very easily.
Yes , I recommend this product
LightCamping
Breckenridge, CO
Outstanding for price
2 years ago
I’ve slept in and out of my truck for coming up on 7 years now. I picked this bag up at the beginning of the season just to have a back pocket option, and it’s been fantastic. If you run cold, you’ll feel chilly below 20 degrees with this bag, but if you’re like me and run warm, this thing can’t be beat for the price. I’ve slept in this thing between 0 degrees and 45 degrees and have always been very comfortable. If you can snag it on sale for 70 bucks there is NO BETTER OPTION at that price point. Pick this up for car camping, not backpacking, and you’ll be stoked you did.
Age:25–34
Weight:175–200 lbs.
Height:6'4"
Yes , I recommend this product
Jeff
Good cold weather sleeping bag for the price
2 years ago
I bought this bag to supplement my 20 degree REI Radiant bag and enable sleeping comfortably at colder temperatures. While the bag did keep me warm in sub 30 degree weather, it didn't keep me any warmer than the Radiant bag. There's also less room inside the bag to move around, so it's a little less comfortable. If this is going to be your only cold weather bag to use for car camping, it's a good bag for the price. But, if you already have a decent cold weather bag, this one probably isn't going to expand the conditions that you can sleep in much.
Range
Aspen, CO
Great buy
2 years ago
I did get to try this bag in 5 degree weather. Gladly i had a spare liner with me! (just a little cotton walmart liner) i was fine the majority of the night but around 3am i was freezing so i put the liner in (thermometer said it was 6 degrees at that time) i would suggest if you are using this below 20 to add a fleece liner and you will be super comfortable down to -10. Great bag for the price!!!
Age:25–34
Weight:175–200 lbs.
Height:5'10"
Yes , I recommend this product
Gabriel
Portland Oregon
Great car camper
4 years ago
This is a great bag for car camping. I took it out in early December in Oregon, where the temperature dropped to 28* and I was actually hot in the middle of the night and had to unzip the bag. It’s a bit big and heavy to take backpacking, unless it was a very short hike in. But for car camping, I couldn’t ask for anything more, especially for the price.
Age:45–54
Weight:150–175 lbs.
Height:6'0"
Yes , I recommend this product
therealsasquatch
Frisco, CO
Comfortable Bag on a Budget
3 years ago
Tested this bag in some 9°F weather car camping in a ski resort parking lot for 2 weeks. I felt comfortable that I wasn’t going to die of hypothermia but I started feeling cold once temps dipped below 23°. Shockingly odor resistant. Zipper gets stuck occasionally. However, for the price, this bag performed better than I expected. And I love the color. As a tall human, I could put the hood up with the long bag and still have enough room to move my arms by my sides.
Age:18–24
Weight:200–225 lbs.
Height:Taller than 6' 5"
Yes , I recommend this product
MamaCamps
San Diego, Ca
Great bag but not for cold weather camping
4 years ago
I love the feel of sleeping this bag. It’s a mummy style but not claustrophobic feeling. Unfortunately, it will not keep you toasty warm to 5 degrees though. We camped at the Grand Canyon in March, with lows in the 20’s and I was pretty cold much of the night. I will be keeping this bag though, because I love it and we usually just summer camp.
Age:35–44
Weight:125–150 lbs.
Height:5'2"
Yes , I recommend this product
Mike
reno nevada
Great for the cold.
4 years ago
I bought this bag for car camping knowing its a heavier bag. It also bulky even when in a compression sack. But I still might end up backpacking with it occasionally. The temps I used it in were below 20 degrees and I was very comfortable. I believe when I purchased this bag there was an XL version that I purchased and the extra room made it incredibly comfortable. I'm not a small guy and after owning several mummy bags I wanted this one to be spacious. Overall excellent value for the money.
Age:25–34
Weight:200–225 lbs.
Height:6'0"
Yes , I recommend this product
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