Thermarest Hyperion 20 UL

Thermarest Hyperion 20 UL

Defy the cold and rest better while moving unencumbered through the mountains.

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The opinion of Aventure Nordique

Defy the cold and rest better while moving unencumbered through the mountains.

Built to provide a featherlight pack weight and high-performance warmth, the Hyperion 20F/-6C is among the lightest in its class without sacrificing an ounce of performance. The bag uses thermally-efficient box baffled construction in key areas to ensure warmth and comfort in an ultralight package. Designed with high-quality materials and Therm-a-Rest performance features, the Hyperion keeps your pack light, giving you the freedom to move quickly in the backcountry. 


    • Ultralight: One of the lightest pieces in its class, the Hyperion sets a new standard for high-performance outdoor equipment.

    • 900-fill Nikwax Hydrophobic Down : Stays drier and maintains loft 60 times longer than untreated down.

    • Unrivaled Packability: Lightweight materials and precise design allow for a smaller packed size than ever before.

    • Box Baffled Construction: Uses mesh walls to maximize loft and minimize cold spots in key areas.

    • Comfort Fit: Ergonomic shape and longer zipper provide a more human-friendly fit than other ultralight bags.

    • SynergyLink Connectors: Integrate the bag with a mattress for optimal efficiency and comfort; removable for versatility.

    • Zoned Insulation: Maximizes warmth and saves weight by intentionally placing fill where you need it most, 70% on the top and sides with 30% on the back.

    • Responsible Down Standard Certified: Certification that ensures that the waterfowl in the down supply chain are treated humanely.

    • Storage sack and compression stuff sack included

    Technical details

    Manufacturer Therm-A-Rest
    Product name Hyperion 20 UL
    Season 3 season
    Model Unisex
    Fill Goose Down
    Cuin 900 cuin
    Comfort rating 0°C
    Comfort Limit -6°C
    Extreme rating -23°C
    Dimensions Fit - S: 156/168 cm - M: 170/183 cm - L : 185/198 cm
    Shoulders - Hips - Feet: S: 140/123/102 cm - M : 145/126/109 cm - L : 147/130/117 cm
    Folded size 15 x 20 cm
    Outer shell 10D Nylon RipStop w/ DWR
    Inner lining 10D Nylon RipStop w/ ThermaCapture Lining
    Fill Weights S : 325 g - M : 345 g - L : 375 g
    Weight S : 539 g - M : 567 g g - L : 624 g
    Colour Blue
    Additional information Stuff sack and storage sack included.
    Warranty Lifetime
    Country of Manufacture China


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