Alpine backpack avalanche backpack suitable for womens colour turquoise style sporty capacity 28 litres weight 204 kg features chest strap hip strap hydration compatible key holder avalanche airbag system padded back emergency whistle waterproof zips outside pockets front pocket additional fastenings ice axe holder ski attachment snowboard holder helmet holder snowshoe attachment rope fixing straps straps compression straps padded hip belt ergonomic sh