How to Choose Sleeping Bags for Backpacking
Big Agnes Anthracite 20 Sleeping Bag - Men's
$139.95
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Stay cozy in the men's Big Agnes Anthracite 20, a mummy-style sleeping bag that's light enough to stuff in your pack for summer backpacking but comfortable enough for backyard campouts with the kids.
Key Details
Fill
Fireline PRO Eco recycled synthetic fibers
Weight
Regular - Left Zip: 2 lbs. 12 oz.
Long - Left Zip: 3 lbs. 1 oz.
Compressed Volume
Regular - Left Zip: 7.4 liters
Long - Left Zip: 11 liters
Temperature Rating (F)
20 degrees (F)
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- This traditional mummy bag provides technical, lightweight performance to excel on and off the trail with high thermal value, compressibility and comfort wherever you go
- Recycled ripstop shell fabric and lining feature a PFC-free water-repellent finish
- Fireline™ PRO Eco Recycled synthetic insulation is made with multidenier, short-staple fibers with high loft to efficiently trap heat
- Silky insulation fibers provide a soft feel and great compression for packability
- Roomier mummy shape than a traditional bag design for light weight and increased thermal value
- Contoured hood follows the shape of your head for a more comfortable fit
- Low-profile cordlock lets you uncinch the hood with one hand
- Insulated tube along upper hood opening seals out drafts when cinched
- 65 in. (165 cm) YKK #5 antisnag locking 2-way zipper with zipper garage offers a smooth, quick zip
- Oversize interior anti-draft collar and no-draft zipper
- Interior fabric loops let you secure a sleeping bag liner (liner not included)
- Exterior loops for hang drying or storage
- Mate together left- and right-zip bags (additional sleeping bag not included)
- Stuff 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 Big Agnes 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 | 22 degrees (F) - ISO |
| Tested Comfort | 32 degrees (F) - ISO |
| Temperature Rating (F) | 20 degrees (F) |
| Temperature Rating (C) | -7 degrees (C) |
| Weight | Regular - Left Zip: 2 lbs. 12 oz. Long - Left Zip: 3 lbs. 1 oz. |
| Shell | Recycled 20-denier 400T polyester ripstop with PFAS-free water-repellent finish |
| Zipper Location | Left |
| Insulation Type | Synthetic |
| Fill | Fireline PRO Eco recycled synthetic fibers |
| Fill Weight | Regular - Left Zip: 1 lb. 14 oz. Long - Left Zip: 2 lbs. 2 oz. |
| Sleeping Capacity | 1-person |
| Lining | Recycled 50-denier 300T polyester pongee |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Regular - Left Zip: 72 inches Long - Left Zip: 78 inches |
| Shoulder Girth (in.) | Regular - Left Zip: 60 inches Long - Left Zip: 63 inches |
| Hip Girth (in.) | Regular - Left Zip: 54 inches Long - Left Zip: 57 inches |
| Stuff Sack Size | Regular - Left Zip: 8 x 17.5 inches Long - Left Zip: 9 x 16 inches |
| Stuff Sack Volume | Regular - Left Zip: 14.4 liters Long - Left Zip: 16.6 liters |
| Compressed Volume | Regular - Left Zip: 7.4 liters Long - Left Zip: 11 liters |
| Gender | Men's |
| Sustainability | Contains recycled materials |
Buying Advice
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Cvank
Chicago,IL
Warm and comfortable. Zippers need some work.
1 year ago
Great winter bag. Used this bag when it was low 27°, winds 15, on top of a 4.2 pad. Worked great and I was very toasty in base layers only. I'm 6'5" tall and able to fit inside. Not much room to move around and zippers seem to get caught. I had a hard time unzipping bag. Zipping up is fine.
Age:25–34
Weight:175–200 lbs.
Height:6'5"
Yes , I recommend this product
Anonymous
Upstate NY
Decent bag, 35f comfort. No mesh bag.
1 year ago
Decent bag, did the job at 35f with a 4.0 pad underneath. I felt nickel and dimed on the purchase though as stamped inside the bag it says, "store in the mesh bag". Well, it doesn't COME with a mesh bag, and REI said they couldn't help us (I thought it came with one, like our other 'lesser' branded bags). Contacted Big Agnes and sure enough, it doesn't COME with one, only a stuff sack that you can't fit the dang bag in. I think for the name/reputation, this is silly and annoying, which for a couple bucks, it should just have the mesh bag with the purchase. Now I have a bag that I can't stuff anywhere, and trust me, the mesh bag that I'll be buying will NOT advertise Big Agnes for free. One star removed for my inconvenience and annoyance.
Age:45–54
Weight:125–150 lbs.
Height:5'2"
Anonymous
Seattle
Nice hardy inexpensive fiber fill bag
1 year ago
Fiber fill bag that compresses reasonably well. For my 6’ son. Got the long, 20 degree version. Decent no snag zipper. Has kept him warm at 35 degrees. Not compressible like down but reasonably good for a backpack if you aren’t an ultralight. Might get one for myself for those ultra wet conditions where you end up real dirty. It washed up well.
Age:18–24
Weight:150–175 lbs.
Height:6'0"
Yes , I recommend this product
Anonymous
Properly rated!
1 year ago
Surprised by how warm this bag could be below freezing. Tested it out on weekend trip with temperatures in the early morning reaching 25F and was warm enough to open up a bit of the mummy bag for most of the night. A bit difficult to pack down, though.
Age:18–24
Weight:150–175 lbs.
Height:5'10"
Yes , I recommend this product
Andrew17
Dallas, TX
Comfortable, but not so warm. Needs better zipper.
6 months ago
Not a bad sleeping bag at all, but not excellent. I just used it for a backpacking trip where temps were in the low 20s (F), and windy. I was quite cold in the bag. I am very lean at 6’2” and just 150lbs, so I may get colder more easily than the average person, but I had to wear my base layer, fleece quarter zip, and a puffer to get warm in addition to using an insulated sleeping pad. I think it would be better optimized in the 35-40 degree range. Additionally, the zipper got caught almost every time I zipped/unzipped the bag. The bag is pretty comfortable and stuffs down pretty small. Easy to pack up.
Age:25–34
Weight:150–175 lbs.
Height:6'2"
No, I do not recommend this product
Sean
California
Warm, Compact, tight fit.
9 months ago
This sleeping bag was warm and packs compact and light. However I am 6'4" 195 lbs and I found it a bit tight to squeeze into. It is a "Long" sleeping bag for someone up to 6'6". Maybe it's normal for this style of sleeping bag to be tight but I personally would have preferred a bit more room to stretch my arms and legs out. It was very warm thought so that was good.
Age:35–44
Weight:175–200 lbs.
Height:6'4"
No, I do not recommend this product
Energizer Bunny
Erie CO
Warm and comfortable
1 year ago
Great bag. Perfect for winter camping. Great price and does the job as the “big brands” without having to pay the big price.
Age:45–54
Weight:150–175 lbs.
Height:5'10"
Yes , I recommend this product
Keil
Florida
Comfortable and Warm
6 months ago
Was on the way to go camping at Juniper Springs in Florida and needed a sleeping bag for the trip. I came into the store knowing nothing other than I needed whatever I got to fit in my ENO DoubleNest hammock. A very helpful employee recommended this bag over a matching ENO sleeping bag or underquilt/overquilt. I took his advice and was happy I did. It was very light, very comfortable, and very warm. Temperatures were dropping to the low 40s/high 30s the two nights we were there and while some of my buddies were cold in their tents with blankets, I was very warm on my hammock in my sleeping bag, regardless of being exposed to the elements and cold air. My feet were slightly less toasty than the rest of my body but some thick socks would remedy that. All in all, I'm very happy with my purchase and thought this sleeping bag performed perfectly in the given conditions.
Age:25–34
Weight:175–200 lbs.
Height:5'7"
Yes , I recommend this product
Pancho Villa
Recommend!
7 months ago
Warm and comfortable. The pack size is a little larger than I would like it to be, but because the sleeping bag is so compressible I was able to fit it into a smaller pack that I have for a different bag. Used this most recently at around 30F and plan to use it in January at 20F. First Big Agnes product that I've owned and I love it!
GoGuyJoe
New Jersey
Absolutely Wonderful!
1 year ago
Given that this is my first down sleeping bag, I was pleasantly surprised. On my most recent trip, I used this bag in 30(F) degree nights and didn’t have a problem. I felt warm and cozy every single night. This has become my go to bag and when it’s time to get a new one, I might just get another. Only issues I found with this bag was the zipper and the stuff sack size. Not sure if it was designed this way or if it’s a manufacturer defect, but the zipper stops about 6 inches from the end of the zippers track. It’s still very much usable. It just bothers my OCD a little. As for the size of it in the stuff sack, it’s kinda tall. I kinda wish it was a little more compact. For the price you pay, I’m not completely upset about the compact size. I understand that not everything can be UL and compact into the size of a Nalgene bottle. It’s a great product overall, and I wanna thank the Associate Christopher from the REI in Marlton NJ for helping my friend and I out.
Age:25–34
Weight:200–225 lbs.
Height:5'11"
Yes , I recommend this product
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