Light and extremely strong, the Trilogy 30 E-1 backpack comes with the new Alpride electric system airbag with easy testing. This is the ideal bag for our alpine community when touring for a day or more.Protective Rolling Closure™ with 5 litres and compression straps New avalanche safety electric system Alpride E-1 / Removable system for year-round use Pack weight w/o airbag system : 1,150 kg Full main compartment access, large opening Shovel and probe inner sheath Ski / ice axe FPP™ holding systemModular ski-holder and lid compression ergonomic strap Ergonomic straps, retractable belt with leg loop, chest strap, load control straps Millet Alpine E1 31 - Avalanche airbag backpack