The stand-alone Black Diamond AvaLung II breathing device is worn under your pack and diverts carbon dioxide away from your face while allowing you to breathe fresh oxygen from the surrounding snowpack in the event of a burial.
S/M fits 44 kg-73 kg (100-160 lb)
M/L fits 68 kg-102 kg (150-225 lb)
Ultra-lightweight—only 265 g (9.3 oz), S/M
Warning Wearing an Avalung is no guarantee of survival in an avalanche. Backcountry travelers are highly advised to educate themselves in snow stability assessment, route finding, companion rescue, and carry all of the conventional avalanche gear in addition to the Avalung.