Black Diamond Avalung II S/M -
The Avalung II Sling by Black Diamond is a life-saving piece of equipment for skiers in avalanche or tree well areas. The Avalung II draws fresh air out of the snow pack in the event of a burial. It moves carbon dioxide away from the air intake, further improving oxygen intake. This mechanism gives your friends and ski patrol more time to find you if you are buried under the snow. The lightweight sling is incredibly versatile, because it can be worn with different packs and equipment. It weighs just over 9 ounces, so you will hardly notice it unless you need it.