A highly compressible sleeping bag with incredibly lightweight and packable PrimaLoft® Hi-Loft Ultra Silver insulation, the Big Agnes V Notch UL 40 sleeping bag will keep you warm and your pack light.
Fill
PrimaLoft Hi-Loft Ultra Silver
Weight
1 lb. 6 oz.
Compressed Volume
1.9 liters
Temperature Rating (F)
40 degrees (F)
- This is a highly compressible, lightweight minimalist mummy bag for your fast and light adventures
- 70% recycled PrimaLoft Silver insulation/30% PrimaLoft Silver insulation
- Minimalist hood with drawcord
- Low-profile cordlock lets you uncinch the hood with one hand
- Full-length zipper can be opened up for quilt use and provides easy temperature regulation
- Left-zip, 70 in. YKK #3 locking zipper
- Ergonomic footbox construction provides extra loft and warmth
- 2-way zipper
- Zipper garage
- Streamlined exterior loops for hang drying or storage
- 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 | 44 degrees (F) - ISO |
| Tested Comfort | 52 degrees (F) - ISO |
| Temperature Rating (F) | 40 degrees (F) |
| Temperature Rating (C) | 4 degrees (C) |
| Weight | 1 lb. 6 oz. |
| Ultralight | Yes |
| Shell | Nylon ripstop featuring a PFAS-free water-repellent finish |
| Zipper Location | Left |
| Insulation Type | Synthetic |
| Fill | PrimaLoft Hi-Loft Ultra Silver |
| Fill Weight | 13 ounces |
| Sleeping Capacity | 1-person |
| Lining | Postconsumer recycled polyester taffeta featuring a PFAS-free water-repellent finish |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | 72 inches |
| Shoulder Girth (in.) | 59 inches |
| Hip Girth (in.) | 53 inches |
| Stuff Sack Size | 6 x 15 inches |
| Stuff Sack Volume | 6 liters |
| Compressed Volume | 1.9 liters |
| Gender | Unisex |