Therm-a-Rest Hyperion 0° Long Sleeping Bag

The Therm-a-Rest Hyperion 0 °C Long is an ultralight down sleeping bag designed for summer hikes, bikepacking, and adventures where reducing weight and volume is a priority. Weighing just 520 g and featuring a highly compact design, it easily fits into a backpack or bike bag.

Its Nikwax hydrophobic goose down fill with a 900 cuin fill power offers an excellent balance of warmth, lightness, and compressibility. Its baffled construction keeps the down in place and helps limit the formation of cold spots.

The insulation is strategically distributed: 70% of the down is placed on the top and sides of the bag, compared to 30% underneath the sleeper. The removable SynergyLink™ straps allow the bag to be attached to the sleeping pad to maintain this correctly positioned distribution during nighttime movements.

Its ergonomic mummy shape limits the volume of air to be warmed, while its 10D ripstop nylon outer fabric with a water-repellent treatment protects the fill from light moisture. The Long size is suitable for users measuring up to 198 cm.

• Comfort temperature: 0°C


• Filling: 900 cuin Nikwax Hydrophobic Down™ goose down


• Fill power: 900 cuin


• Shape: Mummy


• Outer fabric: Ripstop nylon


• Size: Long


• Specifics: Differential cut with warmth zones, thermal collar, compression sack included