Hiking backpack suitable for unisex colour green style sporty capacity 28 litres weight 105 kg height 57 cm width 28 cm depth 21 cm features hydration compatible raincover emergency whistle chest strap hip strap internal pockets valuables pocket outside pockets lid pocket mesh side pockets front pocket additional fastenings walking pole holder straps ergonomic shoulder straps padded shoulder strap compression straps materials synthetic fiber co