P.KU.VDSL Sling Chest Backpack, Ultra-light Water Resistant Packable Shoulder Backpack for Women Men Bicycle Sport Hiking Camping Travel roomy for A4 book-- sling bag with 15L capacity store up to 14" Laptop,wallet, keys, ID card, small snacks and other personal belongings. foldable and lightweight -- cross body backpack can be folded into a small pouch(sandwich size) when not used. Sling cross body bag is packable to be stored. Multifunction -- chest pack shoulder bag can be used as outdoor haversack, bicycle rucksack, travel bag. Idea for hiking, camping, Climbing, cycling, day trip, dog walking, school, shopping. multi pockets and well organized -- Unbalance backpack has 1 main compartment, 1 inner reversible zippered pocket, 2 Outer zippered pockets, 1 side mesh pocket, 1 mobile phone pouch QUALITY material -- triangle pack from waterproof and tear resistant nylon, abrasion resistant SBS zipper, strong YNS buckle, elastic mesh, and precise seam.