Keep your pack featherweight without sacrificing an ounce of performance. The Therm-a-Rest Hyperion 20 down sleeping bag packs down small and keeps you cozy and comfortable on backcountry pursuits.
- 900-fill-power Nikwax Hydrophobic Down™ resists moisture and maintains loft up to 60 times longer than untreated down
- Lightweight materials and precise design allow for a small packed size
- Thermally efficient box baffled construction uses mesh walls to maximize loft and minimize cold spots in key areas
- Ergonomic shape and long zipper provide a human-friendly fit
- SynergyLink™ Connectors integrate the bag with a mattress (not included) for optimal efficiency and comfort; removable for versatility
- Zoned insulation maximizes warmth and saves weight by intentionally placing fill where you need it most, 70% on the top and sides with 30% on the back
- Shell fabric has been treated with a durable water repellent (DWR) to resist moisture
- Storage sack and compression stuff sack included
- Responsible Down Standard certification ensures that the waterfowl in the down supply chain are treated humanely
- Backpacker magazine awarded this sleeping bag a 2019 Editors' Choice Award
Imported.
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.
Best Use | Backpacking |
---|---|
Tested Lower Limit | 20 degrees (F) - ISO |
Tested Comfort | 32 degrees (F) - ISO |
Temperature Rating (F) | 20 degrees (F) |
Temperature Rating (C) | -6 degrees (C) |
Ultralight | Yes |
Shell | Ripstop nylon |
Zipper Location | Left |
Insulation Type | Down |
Water-Resistant Down | Yes |
Fill | 900-fill-power Nikwax Hydrophobic goose down |
Sleeping Capacity | 1-person |
Lining | Ripstop nylon |
Sleeping Bag Shape | Mummy |
Stuff Sack Size | 6 x 8 inches |
Stuff Sack Volume | 3.5 liters |
Compressed Volume | 3 liters |
Gender | Unisex |
Sustainability | Down certified to the Responsible Down Standard (RDS) |