Brand New with Tags, Long, Unisex The Hyperion 32°F/0°C 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. 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: Removeable ultralight straps create a secure bag-to-sleeping pad connection that optimizes the comfort and thermal efficiency of your entire sleep system. SynergyLink Connectors function best with regular sized sleeping pads that are 3 inches thick or less when inflated. 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