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 hiking, bikepacking, and adventures where reducing weight and bulk is a priority. Weighing only 520g and being very compact, it easily fits into a backpack or bike pannier.

Its Nikwax hydrophobic 900-fill-power goose down insulation 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. Removable SynergyLink™ connectors allow the bag to be attached to the sleeping pad to maintain this distribution correctly positioned during nighttime movements.

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

• 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