Thermarest Hyperion™ 32F/0C Sleeping Bag

The fill is 900-fill Nikwax Hydrophobic Down sourced from geese and certified by the Responsible Down Standard, maintaining loft 60 times longer than untreated down in wet conditions. Box baffled construction in key areas uses mesh walls to let the fill loft fully and evenly, while Zoned Insulation distributes 70% of the fill on top and sides where your body loses the most heat and 30% on the back where your sleeping pad handles insulation from below. The result is a Regular size bag that weighs just 1 lb with a packed size of 5.5 x 6 inches.

The 10D nylon ripstop shell and lining with DWR finish is about as light as sleeping bag fabric gets while remaining functional in backcountry conditions. The ergonomic shape and longer zipper provide a more comfortable fit than many ultralight bags in this category, and SynergyLink Connectors anchor it to your sleeping pad for a sleep system that stays aligned through the night.

• Temperature rating: 32°F/0°C (EN Comfort 41°F/5°C, EN Limit 32°F/0°C)
• Fill: 900-fill goose Nikwax Hydrophobic Down (RDS certified)
• Shell and lining: 10D nylon ripstop with DWR finish
• Zoned Insulation: 70% top and sides, 30% back
• SynergyLink Connectors for pad integration (removable)
• Small: 15 oz (440g), fits to 5'6", packed 5.5 x 6 in
• Regular: 1 lb (460g), fits to 6'0", packed 5.5 x 6 in
• Long: 1 lb 2 oz (520g), fits to 6'6", packed 5.5 x 6 in
• Includes compression stuff sack and storage sack