Thermarest Hyperion 20F Sleeping Bag, Long

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. Storage sack and compression stuff sack included.

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.