Therm-a-Rest Hyperion -6° Long Sleeping Bag

The Therm-a-Rest Hyperion -6 °C Long is an ultralight down sleeping bag designed for treks, bivouacs, and adventures where every gram counts. Weighing just 630 g, it offers an excellent balance of warmth, weight, and compressibility for three-season use.

Its Nikwax hydrophobic goose down fill with a 900 cuin fill power retains its loft more effectively in damp conditions than untreated down. Its baffled construction promotes an even distribution of down and helps prevent cold spots.

To reduce weight without compromising thermal efficiency, 70% of the down is placed on the top and sides of the bag, compared to 30% underneath the sleeper. The removable SynergyLink™ connectors allow the bag to be attached to the sleeping pad to keep this distribution properly positioned throughout the night.

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

• Comfort temperature: -6 °C


• Filling: 900 cuin Nikwax Hydrophobic Down™ goose down


• Fill power: 900 cuin


• Shape: Mummy


• Outer fabric: Ripstop Nylon


• Size: Long


• Features: Differentiated construction with warmth zones, thermal collar, compression sack included