The Therm-a-Rest Hyperion 20 UL Sleeping Bag is bag is lightweight and designed for backpacking and mountaineering. Compressible down insulation and a tapered mummy shape team up to keep weight and packed size to a minimum. 

• Shell Material: 10D Nylon Ripstop with DWR
• Lining: 10D Nylon Ripstop ThermaCapture
• Insulation: 900 Fill Goose Down NHD/RDS
• Lightweight: The Hyperion is one of the lightest sleeping bags in its class
• Unrivaled Packability: Lightweight materials and precise design allow for a smaller packed size than ever before.
• Box Baffled Construction:To maximize thermal efficiency in key areas, we use mesh box baffles to boost loft and eliminate cold spots at the seams of the sleeping bag or quilt.
• Comfort Fit: Ergonomic shape and longer zipper provide a more human-friendly fit than other ultralight bags.
• SynergyLink™ Connectors: These removable straps integrate your mattress and sleeping bag to minimize heat loss and keep you secure through the night.
• 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
• Temperature rating: 20 deg. F
• Fits 6'6" length
• Fits 58 in. girth
• Packed Dimensions: 5.5 x 6 in.
• Weight: 18 oz.
• Imported