The Ultimate Backcountry Sleep System: 23°F Mummy Bag

Stop choosing between heavy synthetic bags and fragile, overpriced down. Engineered for rugged peak-baggers, alpine trekkers, and weekend warriors alike, this hybrid mummy bag delivers the holy grail of outdoor gear: maximum thermal efficiency, waterproof reliability, and ultralight packability. When the mountain weather turns volatile and the mercury drops, this is the gear you want in your pack.

It pairs premium, high-loft 650 Fill Power White Duck Down (90%) with advanced thermal synthetic fibers. This sleep system traps maximum body heat down to 23°F, yet maintains its insulation properties even if tent condensation or a sudden downpour strikes. The precision-contoured ergonomic mummy cut hugs your body to completely eliminate cold, dead air spaces. The high-performance nylon ripstop shell is treated with a resilient waterproof coating that effortlessly shrugs off moisture and dew. Space is premium, so this bag effortlessly squishes down into its included heavy-duty compression stuff sack, shrinking to a fraction of its size so you can keep your pack lean and agile.

*Ships from the United States!*

Features & Specs -