New for 2019: During ultralight objectives, the 16-ounce Hyperion provides peak performance for uncompromising adventurers. The Hyperion 32F/0C sleeping bag is among the lightest in its class while still providing high-performance during backcountry pursuits. 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 featherweight without sacrificing an ounce of performance. Storage sack and compression stuff sack included Features 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. Small Regular Long Height (Standard) 4 in 4 in 4 in Fits (Standard) 66 in 72 in 78 in Fits (Metric) 168 cm 183 cm 198 cm Weight (Standard) 15 oz 1 lb 1 lbs 2 oz Fill material 900 Fill Goose NHD/RDS 900 Fill Goose NHD/RDS 900 Fill Goose NHD/RDS Weight (Metric) 0.44 kg 0.46 kg 0.52 kg Width (Standard) 27.5 in 28.5 in 29 in Width (Metric) 70 cm 72 cm 74 cm Length (Standard) 73 in 80 in 85 in Length (Metric) 185 cm 203 cm 216 cm Girth, Shoulder (Standard) 55 in 57 in 58 in Girth, Shoulder (Metric) 140 cm 145 cm 147 cm Girth, Hip (Standard) 48.5 in 49.5 in 51 in Girth, Hip (Metric) 126 cm 126 cm 130 cm Girth, Foot box (Standard) 40 in 43 in 46 in Girth, Foot box (Metric) 102 cm 109 cm 117 cm Packed dimension (Standard) 5.5 x 6 in 5.5 x 6 in 5.5 x 6 in Packed dimension (Metric) 14 x 15 cm 14 x 15 cm 14 x 15 cm EN Comfort (F) 41 F 41 F 41 F EN Comfort (C) 5 C 5 C 5 C EN Limit (F) 32 F 32 F 32 F EN Limit (C) 0 C 0 C 0 C EN Extreme (F) 5 F 5 F 5 F EN Extreme (C) -15 C -15 C -15 C Fill weight (Standard) 8 oz 9 oz 10 oz Fill weight (Metric) 0.24 kg 0.26 kg 0.29 kg Shell fabric 10D Nylon RipStop w/ DWR 10D Nylon RipStop w/ DWR 10D Nylon RipStop w/ DWR Liner fabric 10D Nylon RipStop w/ ThermaCapture Lining 10D Nylon RipStop w/ ThermaCapture Lining 10D Nylon RipStop w/ ThermaCapture Lining Zipper side Left Left Left