Black Diamond Covert 22L Avalung Backpack 2009: Friends, lovers, swingers, sailors, let’s get one feature straight that separates the Black Diamond Convert 22 Avalung Backpack with all the other packs on the market -- this one could save your life. This backpack is made specifically for backcountry riders who smartly fear the wrath of the avalanche. An Avalung Breathing System is intact that allows you to keep breathing in an avalanche, making it possible to pull this air from the snow. You breathe in and out through the tube that is easily reachable on your shoulder. The patented system within the AvaLung separates the O2 from the exhaled CO2, which is directed away from the air intake and out the back of the vest to diffuse through the snow pack. The pack is built from tough, water-shedding 420D nylon and 1300D Ballistic reinforcements using a clamshell design for easy gear access. On the exterior, an adjustable ski/board attachment system, ice tool loops, compression straps and an avy-tools pocket let you conveniently carry your essentials, and the right shoulder strap features a zippered hydration tube pocket. Stay alive for next season with the Black Diamond Convert 22 Avalung Backpack 2009.