The Mammut Light RAS Airbag Backpack is spacious enough to hold all your gear and other essentials on a full day tour in the backcountry, but it's such a featherweight that it makes travel a breeze on long skins or rapid fire yo yo laps. The Removable Airbag System RAS uses a large square airbag that deploys in a hot second well, three to help prevent burial in the event of a slide by decreasing your mass to surface area ratio think what happens to the big chips when you shake a bag they all rise to the top. A safety leg loop keeps the pack in place so the airbag deploys in the correct position, even if you're tumbling, and the bag's bright orange color makes it easier for rescuers to spot you. The RAS system is superlight, at just two pounds, but it's easy to pop out of the pack if you're wearing it inbounds or during the summer months. This drops the pack's weight to just over two pounds and opens up a little more of the 30L of storage capacity, so you can haul a little more gear. Outside, the Light RAS features a diagonal ski carrier and snowboard carrier plus two ice axe attachments to keep your gear neat, secure, and easy to access. Use your hydration system with this pack for easy thirst quenching on the go and cinch down the sides when you're traveling light to keep it close to your back, stable, and streamlined. 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.