Hyperion 20F/-6C REGULAR sleeping bag
An outstanding weight-to-warmth balance. Sleep in sub-zero temperatures without filling your pack. The lightest sleeping bag in its category.
The Thermarest Hyperion 20F/-6C regular sleeping bag combines everything you need when seeking warmth, compactness and light weight. The Hyperion 20F/-6C regular suits trekkers facing low temperatures who count every gram.
Unrivalled light weight and compactness in this temperature range
The Thermarest Hyperion20F/-6C regular is the lightest sleeping bag in our -1°C to -5°C range. At just 600 grams, it is the featherweight of its category.
Its goose down fill has a 900 cuin fill power, another mark of quality as this is the highest fill power available on the market. Once released from its compression sack, your Hyperion will feel like your duvet at home, providing excellent sleeping comfort.
The materials allow you to compress the bag fully without damage. Rolled up, it becomes tiny and fits easily into the bottom of your backpack.
Outstanding thermal performance for cold nights
The 900 cuin goose down makes this sleeping bag exceptionally lofty, ultralight and extremely compact, while delivering impressive thermal performance.
- The down used in the Thermarest Hyperion is Nikwax Hydrophobic Down. Treated against moisture, it stays dry, absorbing 90% less moisture than standard down and drying 3 times faster. This technology also helps down retain its loft 60 times longer than untreated down.
- The Hyperion -6 has a ThermaCapture lining that reflects body heat to retain it more effectively.
- The fill is distributed differently across zones to maximise warmth where the body needs it most.
- Mesh baffles maintain loft and prevent cold spots.
The down is RDS-certified (Responsible Down Standard), sourced with respect for the environment and animal welfare. The hydrophobic treatment is guaranteed free from hazardous perfluorinated compounds (PFCs).
The Thermarest Hypérion 20F/-6C regular sleeping bag features:
- A protective zip flap
- Hood with drawcord adjustment
- Removable SynergyLink connectors: attach your sleeping bag to your mat for maximum comfort
It comes with a storage sack and a compression sack.
The Hyperion also comes in a less warm but even lighter version: the Hyperion 0 sleeping bag
A larger version is also available: the Hyperion 20F/-6C long sleeping bag
Other features:
- Fill: 900 cuin RDS goose down with Nikwax hydrophobic treatment
- Outer fabric: 10D ripstop nylon
- Lining: 10D ThermaCapture ripstop nylon
- Warranty: 2 years
The Therm-a-Rest Hyperion range
- Regular
- Long
 |  | |
|---|---|---|
| Comfort temperature | 5 °C | 0 °C |
| Comfort limit temperature | 0 °C | −6 °C |
| Verified weight | 500 g | 675 g |
| Price | €495.00 Unavailable | €545.00 |
