Patent ID: 8196582

Claim:
An apparatus to extract breathable air from snow, the apparatus comprising: an air-permeable extraction assembly attached to a backpack, the air-permeable extraction assembly comprising at least one air intake cavity and an air-permeable membrane, the air-permeable membrane disposed over the air intake cavity, the air-permeable extraction assembly located on an outer surface of the backpack such that the air-permeable extraction assembly is exposed to snow in response to burial of the backpack by the snow; a mouthpiece in fluid communication with the at least one air intake cavity, the mouthpiece drawing intake air through the at least one air intake cavity in response to inhalation by a user; and a transfer guide coupled to the air-permeable extraction assembly and the mouthpiece, the transfer guide passing intake air from the air-permeable extraction assembly to the mouthpiece in response to inhalation by a user.