Using only ethically sourced Polish goose down, the Crux Torpedo 700 Sleeping Bag has a fill power in excess of 925 for complete warmth and total comfort when sleeping on the wall. Alpinist and engineer, Carol McDermott, founded Crux in 2002 all of Crux's products are designed in his home, located in the South of France, pinned between Carcassonne and the Pyrenees. With a temperature rating of 25 degrees Fahrenheit, the Torpedo will excel during summer ascents in the high alpine whether you're climbing in the Andes, Rockies, or Pyrenees. A waterproof, breathable eVent membrane prevents moisture from working into the Torpedo's high quality goose down fill and promotes breathability if the temperatures start to climb throughout the night. A soft anthracite lining maintains top shelf comfort when you're sleeping in your skivvies, and a highly water resistant Riri Aquazip zipper prevents water from wandering in. An included roll top stuff sack packs the bag down to around thirteen inches, while a storage sack keeps the bags exceptional down in top form for your next ascent.