Black Diamond AVALUNG This gear allows you to breathe for 1-2 hours while waiting for rescue if buried in an avalanche. I used to carry it as a safety measure when backcountry skiing. I'm selling it because I've switched to an airbag system and no longer need it. I have never been buried and used it in a real avalanche. (I used it a few times for practice, and it has been disinfected with alcohol and lightly cleaned.) I checked the bellows and the whole unit for any damage due to deterioration, and it seems to be fine at this time. *I usually ship within 2-3 days, but I will be out of the prefecture from August 9th to 12th, so I will ship it after I return.