If you picked up a Protection Airbag System compatible pack at a ski swap and haven't yet put an airbag in it, you might as well sell it and use the money to buy yourself some new shoes and a nice haircut mom will be so proud. If that sounds dumb, hold on to the pack and pick up the Mammut Protection Airbag System, which is pretty much the whole point of having the bag in the first place. Compatible with all MammutSnowpulse Protection Airbag packs but NOT with their RAS packs, or the packs of any other manufacturer the Protection Airbag System is revolutionary because it not only keeps you on the surface of an avalanche, with your head pointing up the hill to reduce the risk of asphyxiation, but inflates over your chest and torso to prevent the trauma that's so common in avalanche accidents. With a quick pull of the shoulder strap mounted handle, the 150L airbags inflate within seconds, helping to prevent burials and serving as brightly colored locators to facilitate easy searches. Simply ensure that the pack is mounted correctly on your back so the airbags deploy properly, and that your refillable canister not included, but sold right here is full and correctly attached, and enjoy the added safety net when you're shredding the backcountry. Please remember, this airbag system is NOT a guarantee that you will survive an avalanche get educated, get the right tools, travel with partners, and be smart out there.