This is the full Y MountainLine 40 Daypack including full Safeback SBX avalanche rig in the custom designed lid. Safeback SBX is patented technology designed to continuously retrieve fresh air from the snowpack surrounding the user's backpack, delivering it up to their breathing area. This supplies them with fresh air to inhale and pushes the CO2 they exhale away from their face. Powered by 6 Lithium AA batteries for maximum performance at cold temperatures - lab and field tested to run for 90 minutes at -30C. Air pump optimized to provide the victim enough air to keep breathing for the maximum amount of time under the snow. Today's rescue window for avalanche victims is set at 15 minutes, where 70% of deaths are the result of suffocation. Safeback SBX provides a user-friendly defense against suffocation for 90 minutes.