How to Choose Sleeping Bags for Backpacking
Anacortes
Therm-a-Rest Polar Ranger -20 Sleeping Bag
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Built for extended use in the Arctic cold, the light and feature-rich Therm-a-Rest Polar Ranger -20 sleeping bag was designed in conjunction with renowned polar explorer Eric Larsen.
Shop newer versionKey Details
Fill
800-fill-power Nikwax Hydrophobic Down
Temperature Rating (F)
-20 degrees (F)
- Ultralight shell and soft liner are made from 100% recycled nylon; shell and liner are certified to the Global Recycled Standard
- Box-baffled construction is filled with highly compressible, PFC-free 800-fill-power Nikwax Hydrophobic Downâ„¢ that maintains loft
- Nikwax Hydrophobic Down absorbs 90% less water and dries 3 times faster than untreated down—a big plus on long trips where periodic drying is required
- Down is certified to the Responsible Down Standard
- Drafts are kept at bay by extensive, overstuffed draft tubes that overlap to prevent cold spots when closed
- Unique snorkel hood helps seal in warmth while routing exhaled moisture away from the bag to preserve loft; magnetic closure keeps cross drafts at bay and eases entry/exit
- Cinchable draft collar helps keep heat in
- A pair of side vents provide customizable temperature control—and free your arms while still in the bag
- Antisnag YKK zipper ensures easy entries and exits and helps prevent tears
- Insulated Toe-asisâ„¢ foot-warming pocket helps keeps feet toasty
- SynergyLinkâ„¢ connectors secure your bag to your sleeping pad to optimize the comfort and thermal efficiency of your entire sleep system
- Interior stash pocket lets you keep essentials close to hand
- External loops let you attach a quilt or blanket (not included) for more warmth
- Compression and storage sack included
Imported.
Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.
Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Therm-a-Rest Backpacking Sleeping BagsEach bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
| Best Use | Backpacking |
|---|---|
| Tested Lower Limit | -20 degrees (F) - EN |
| Tested Comfort | -4 degrees (F) - EN |
| Temperature Rating (F) | -20 degrees (F) |
| Temperature Rating (C) | -30 degrees (C) |
| Shell | Recycled nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 800-fill-power Nikwax Hydrophobic Down |
| Sleeping Capacity | 1-person |
| Lining | Nylon |
| Sleeping Bag Shape | Mummy |
| Gender | Unisex |
| Sustainability | Down certified to the Responsible Down Standard (RDS) Contains recycled materials |
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Customer Images
3 years ago
I use the sleeping bag
I use the sleeping bag in the arctic right now. It is very warm, light , love the head spot in the hole for the mouth. Very good for the aeration and let the condensation get out. I just have two negative point. First one. The zipper. The plastic thing on the zipper is very nice idea. But sometimes the zipper stuck on the material and can break the tissue. The second point is the bungee under. There are not large and long enough for the neoair sleeping pad. It is very tight. Too much.
Review originally posted on a Cascade Designs brand site
Location:MN
Age:25–34
Weight:175–200 lbs.
Height:6'2"
2 years ago
Very Warm!
Yes , I recommend this product
I’ve taken this bag down to 0F so not its bottom range yet but I haven’t even had a chill inside of it yet. Very comfy and I like the hood coverage around my head. My only complaint is the stuff sack is too small. I really struggle to get the bag in the stuff sack and the sack ripped a little last time I tried so I started stuffing it into one of my larger dry bags when I pack it down. It still fits in my sleeping bag compartment of my backpacking pack. The dry bag also provides more water protection so it’s not a bad swap regardless.
Age:25–34
Weight:175–200 lbs.
Height:6'2"
2 years ago
She's a keeper.
Yes , I recommend this product
Used in -4 weather. Something I struggle with is finding a sleeping bag that doesn't have too much dead space. I'm 5'3", 118lbs, and this sleeping bag did not have any cold spots throughout the night. I run cold, but I slept like a baby. I am fully converted to a Therm-a-rest quiver of sleeping bags and quilts.
2 years ago
This bag is simply amazing..
I bought this bag for a trip I am taking that may need this temperature range. I will update this review once I am done with the trip - but early testing in the outdoor shows this sleeping bag is just what I needed. It also looks great.. but looks do not help you when freezing.. If you need this temperature range then you will not be disappointed.. and if you also are in the middle of a fashion show with this bag you will not be disappointed either :)
Review originally posted on a Cascade Designs brand site
1 year ago
Warm winter bag
Unique, sculpted hood is really warm. This bag is great for winter camping when temperatures are well below freezing. Center zipper is okay but takes a bit of getting used to. My wife likes the arm-zippers when she reads while in the bag. Overall a different style bag that’s very efficient in cold temperatures.
Review originally posted on a Cascade Designs brand site
3 years ago
I’ve owned over 10 bags. This is the best.
Best bag ever. I have been at this for a while. I know what I’m talking about. This bag is amazing. I’ve used it down to -30 at night and im fine. The center zip and arm zips are really convenient and comfortable. But most important is the hood design is clearly the way all hoods should be designed.
Review originally posted on a Cascade Designs brand site
2 years ago
Best winter sleeping bag I've owned
By far my most loved piece of equipment I own! I love the fact that there is a place to put your hot Nalgene at your feet without burning them and the fact that you can take your arms out to do little stuff without having to get out completely.
Review originally posted on a Cascade Designs brand site
1 year ago
Exceptional.
Exceptional range of comfortable warmth. I love this bag!
Review originally posted on a Cascade Designs brand site
3 years ago
Great good design makes this
Great good design makes this bag warmer than I expected!
Review originally posted on a Cascade Designs brand site
2 years ago
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