Therm-a-Rest Hyperion 20°F Sleeping Bag Review

Therm-a-Rest Hyperion 20°F Sleeping Bag Review

The Hyperion is the newest sleeping bag in Therm-a-Rest’s Fast and Light line and it's one of the lightest and most compressible bags we’ve ever tested. The Hyperion comes in two temperature ratings (20°F and 32°F), which both use very high-quality 900-fill-power down to make them extremely warm while keeping weight to an absolute minimum.

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