With packable 800-fill-power down and aggressive, thermally efficient patterning, the men's NEMO Kayu 15 mummy sleeping bag is an excellent choice for fast-and-light adventures.
Fill
PFC-free down
Temperature Rating (F)
15 degrees (F)
- Each curve is tailored for efficiency and comfort—the contoured hood, shaped footbox and body-mapped tapered core are designed for ideal fit with no wasted space
- 800-fill-power down is hydrophobic, PFC-free and Responsible Down Standard (RDS) certified for traceability and humane treatment throughout the supply chain
- Down insulation is treated with Nikwax™ for water-resistant warmth at your campsite
- Shell and lining have been treated with a durable water repellent (DWR) to help resist moisture
- Thermo Gills™ provide customizable temperature regulation without letting cold drafts in
- Waterproof and breathable footbox and hood protect you from head to toe against tent wall condensation
- A fabric set of 20-denier nylon ripstop and 30-denier nylon taffeta is soft and plush for a comfortable sleep experience
- Aggressive patterning is designed for optimal thermal efficiency and packability
- Full-length YKK zipper with snagless baffle construction and draft tube seals warm air in
- Pairs with the women's Aya sleeping bag (sold separately)
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 NEMO 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 | 16 degrees (F) - EN |
| Tested Comfort | 28 degrees (F) - EN |
| Temperature Rating (F) | 15 degrees (F) |
| Temperature Rating (C) | -9 degrees (C) |
| Shell | 20-denier ripstop nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | PFC-free down |
| Lining | 30-denier nylon taffeta |
| Sleeping Bag Shape | Mummy |
| Stuff Sack Volume | 6 liters |
| Gender | Men's |