We load up and strap on the Free 28L Removable Airbag 3. 0 when hunting down steep lines of fresh fluff. The running-vest-inspired harness system delivers an optimized fit that hugs our every move for a distraction-free carry on both the climb and the drop. Kitted with Mammut's ultralight, compact Airbag System 3. 0, this pack saves grams yet gives us peace of mind while managing sluff.