Made for side-sleeping comfort, the Western Mountaineering TerraLite 25 sleeping bag is wider through the middle than at the shoulders for a roomy fit. Plus, both zippers open for use as a comforter.
Fill
850+ fill-power goose down
Weight
6 FT Left Zip: 1 lb. 13 oz.
6 FT 6 IN Left Zip: 1 lb. 15 oz.
Compressed Volume
7.9 liters
Temperature Rating (F)
25 degrees (F)
- Designed with a wide girth through the middle of the bag—ideal for side sleepers
- Despite the comfortable shape and roomy interior, this bag weighs less than 2 pounds
- 12-denier ripstop nylon shell fabric is breathable and durable; 15-denier nylon taffeta lining material
- 2 zippers allow this bag to to open completely for greater temperature regulation; second zipper opens the bag up completely around the feet
- With both zippers open, this bag can serve as a fairly wide camper van comforter
- Zippers can also mate with Western Mountaineering mummy bags
- Full-length #5 YKK zipper provides a smooth, easy unzipping experience while saving weight
- Insulated draft tube blocks cold air and keeps the torso better insulated
- Insulated with 850+ fill-power ethically sourced premium goose down
- Continuous baffles allow you to shift down for more insulation in colder weather
- Comes with ultralight stuff sack and breathable mesh storage bag
- Part of the Western Mountaineering ExtremeLite™ Series
Made in USA.
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 Western Mountaineering Camping 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 | Camping |
|---|---|
| Tested Lower Limit | 19 degrees (F) - ISO |
| Tested Comfort | 28 degrees (F) - ISO |
| Temperature Rating (F) | 25 degrees (F) |
| Temperature Rating (C) | -4 degrees (C) |
| Weight | 6 FT Left Zip: 1 lb. 13 oz. 6 FT 6 IN Left Zip: 1 lb. 15 oz. |
| Ultralight | Yes |
| Shell | Nylon ripstop |
| Zipper Location | Left |
| Insulation Type | Down |
| Fill | 850+ fill-power goose down |
| Fill Weight | 6 FT Left Zip: 1 lb. 2 oz. 6 FT 6 IN Left Zip: 1 lb. 3 oz. |
| Sleeping Capacity | 1-person |
| Lining | Nylon taffeta |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | 6 FT Left Zip: 72 inches 6 FT 6 IN Left Zip: 78 inches |
| Shoulder Girth (in.) | 65 inches |
| Hip Girth (in.) | 68 inches |
| Stuff Sack Size | 7 x 13 inches |
| Stuff Sack Volume | 7.9 liters |
| Compressed Volume | 7.9 liters |
| Gender | Unisex |