RockRooster Large Backpack for Outing, P2RockRooster Large Backpack, Waterproof Backpack for Travelling, Cycling, Camping Use Model: P2 Anti TheftSide hidden zipper and secret stash pocket protect your precious articles when traveling or lining up. The EVA foam that gives the backpack its slick, as well as cushions your belongings inside. Large CapacityTheres open space for your large items and internal pockets to compartmentalize your specifics such as your laptop. With 22L of storage