With 2 ultralight down-filled bags combining to make a comfortable, versatile sleep system, the modular Big Agnes Lost Ranger UL 3N1 15 sleeping bag easily adapts to the weather and your warmth needs.
Fill
850-fill-power DownTek down
Weight
Regular: 2 lbs. 3 oz.
Long: 2 lbs. 6 oz.
Compressed Volume
Regular: 7 liters
Long: 8.4 liters
Temperature Rating (F)
15 degrees (F)
- System consists of 2 down-filled bags that can be used together or separately, depending on your sleep style and temperature preference
- Maximum warmth is achieved when the inner and outer bags are layered, using offset quilting to minimize cold spots—this combined configuration has a tested lower limit of 15°F
- Using the inner bag alone provides warmth down to about 35°F; the outer bag alone provides warmth down to about 50°F
- Ultralight, durable materials with 850-fill-power Downtek™ water-repellent down keep weight to a minimum without sacrificing comfort
- Water-repellent finish is PFC free
- Sleep on either side using the inner bag alone or within the outer bag; 3/4-length, anti-snag ambidextrous zipper stays out of the way when side sleeping
- Inner bag design mimics the award-winning Sidewinder sleeping bag, designed for side sleepers and made to move with you from side to side
- Keep your head snug and warm using the inner bag with jacket-style hood
- Spacious, rectangular-shaped outer bag is constructed with a no-draft collar, no-draft wedge and a single no-draft, antisnag left-side zipper with zipper garage
- 2-way zippers at both the top and bottom of the inner and outer bags allow easy temperature control throughout the night
- Hand-tuck pockets at the top of the outer bag provide additional hand warmth
- Easy access to the discreet pillow barn on the pad sleeve keeps your pillow tucked in all night
- Pad Cinch System adjusts to a variety of pad sizes; a self-equalizing drawstring easily connects the bag to the pad, and the middle securement feature provides extra stability
- For the regular-length bag, use a rectangular sleeping pad measuring 20–30 in. wide and 72 in. long (pad not included)
- For the long-length bag, use a rectangular sleeping pad measuring 20–30 in. wide and 78 in. long (pad not included)
- Storage sack and 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 | 17 degrees (F) - ISO |
| Tested Comfort | 28 degrees (F) - ISO |
| Temperature Rating (F) | 15 degrees (F) |
| Temperature Rating (C) | -9 degrees (C) |
| Weight | Regular: 2 lbs. 3 oz. Long: 2 lbs. 6 oz. |
| Shell | Ultralight ripstop nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 850-fill-power DownTek down |
| Fill Weight | Regular: 15 oz. Long: 1 lb. 1 oz. |
| Sleeping Capacity | 1-person |
| Lining | Ultralight ripstop nylon |
| Sleeping Bag Shape | Semirectangular |
| Fits Up To (in.) | Regular: 72 inches Long: 78 inches |
| Shoulder Girth (in.) | Regular: 69/62 inches Long: 72/65 inches |
| Hip Girth (in.) | Regular: 61/54 inches Long: 64/57 inches |
| Stuff Sack Size | 8 x 17.5 inches |
| Stuff Sack Volume | 14.4 liters |
| Compressed Volume | Regular: 7 liters Long: 8.4 liters |
| Gender | Unisex |
| Sustainability | Down certified to the Responsible Down Standard (RDS) |