How to Choose Sleeping Bags for Backpacking
Big Agnes Torchlight UL 20 Sleeping Bag
$314.73Compared to $449.95*Save 30%
Designed for gram-counting backpackers who want lightweight gear without sacrificing comfort, the Big Agnes Torchlight UL 20 down sleeping bag will keep you warm without weighing down your pack.
Key Details
Fill
850-fill-power DownTek (PFC-free) down
Weight
Long: 2 lbs. 7 oz.
Compressed Volume
2.7 liters
Temperature Rating (F)
20 degrees (F)
- Optimized thermal efficiency with body-mapped baffle construction and PFC-free water repellent finish shell fabric
- 850-fill-power DownTekâ„¢ down insulation repels water while maintaining insulating value
- Lightweight polyester taffeta lining with a wicking finish that disperses moisture for a quick dry and optimal moisture management
- 2 zippered panels—running from shoulder to footbox—add an extra 5 in. (13 cm) of room to each side for 10 in. (25 cm) total when completely expanded
- Comfortable jacket-style hood opening contours to the shape of your face for a snug fit
- Vaulted footbox construction provides extra loft and warmth
- 3D antisnag draft tube prevents heat loss along the zipper
- Seal out drafts by cinching the insulated tube along upper hood opening
- Low-profile cordlock allows you to uncinch the hood using one hand
- Stash pocket for phones and other items in an internal mesh pocket
- Interior fabric loops allow you to secure a sleeping bag liner (not included)
- Easily hang dry or store bag with streamlined exterior loops
- Includes a storage sack and stuff sack
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 | 20 degrees (F) - ISO |
| Tested Comfort | 29 degrees (F) - ISO |
| Temperature Rating (F) | 20 degrees (F) |
| Temperature Rating (C) | -7 degrees (C) |
| Weight | Long: 2 lbs. 7 oz. |
| Shell | Ultralight ripstop polyester with a PFC-free water repellent finish |
| Zipper Location | Right |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 850-fill-power DownTek (PFC-free) down |
| Fill Weight | Long: 1 lb. 3 oz. |
| Sleeping Capacity | 1-person |
| Lining | Polyester taffeta with a moisture-wicking finish |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Long: 78 inches |
| Shoulder Girth (in.) | Long: 62-72 inches |
| Hip Girth (in.) | Long: 56-66 inches |
| Stuff Sack Size | 8 x 17.5 inches |
| Stuff Sack Volume | 14 liters |
| Compressed Volume | 2.7 liters |
| Gender | Unisex |
| Sustainability | Down certified to the Responsible Down Standard (RDS) |
Buying Advice
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Voffs
Missoula MT
Great sleeping bag! Buy once, cry once!
4 months ago
I want to add my review to counteract the one 1 star review for this product (that probably comes from someone who has no idea what they’re doing.) This is a great sleeping bag! I’ve been using mine for 2 years now, have been in it in the teens, and if you know how to properly use it (keeping it lofted in storage, letting it loft after purchase and not just slamming it into your backpacking pack after you get a package at your door) it will serve you well! Baffles are perfect for if you need less or more heat depending on the conditions of the evening. Packs down tight, carries light, far outperforms sleeping bags with similar temp ratings.
Age:25–34
Fishboi
Idaho
4.5/5
3 months ago
I’m a big guy with a broad chest and after looking for hours online I wasn’t left with very many options. Overall I am very happy with the purchase. Pros: - Very warm, pushed the comfort rating temperature and was still very warm overall (I did have and exped ultra 3r pad) - Compacts great! - Plenty of room with the expansion zippers Cons: - the only con I had was that the zipper gets caught quite a bit and that gets annoying but overall I am very happy with the purchase
Age:25–34
Yes , I recommend this product
Derick2025
Millers Creek , North Carolina
Absolutely wouldn’t recommend
6 months ago
Used one time on a 32 degree night and had to put my down jacket on inside the bag . The bag claims to be 850 fill , not even close to that, no loft at all . Zippers are a fight to zip or unzip !
Age:55–64
No, I do not recommend this product