Alpine backpack avalanche backpack suitable for womens colours black grey style sporty capacity 20 litres weight 229 kg height 52 cm width 29 cm depth 18 cm features chest strap hip strap emergency whistle hydration compatible key holder back protector avalanche airbag system internal pockets snow tool pocket outside pockets front pocket additional fastenings ice axe holder ski attachment snowboard holder helmet holder snowshoe attachment strap