Soarpop 50+5L Waterproof Wear Resistant Ripstop Internal Frame Mountaineering/Climbing/Hiking/Trekking Backpack Travelling/Camping Bag with Rain Cover Hard-wearing, and tear-resistant nylon oxford material,ergonomic 3D sponge back cushion,internal frame hidden in back of backpack,deliberately bar-tack at major stress points,breathable and comfortable and relieve weight and stress on your shoulders. This backpack is made with 50+5L capacity, is ideal for backpackers,mountaineers and hikers with massive pack of sundries. Reasonable pockets and compartments keep your 15 inch laptop,cellphone,clothes, equipments,even a little pen stay organized.Two sides' adjustable straps and mesh pockets can hold your sleeping bag,tent,umbrella,and water bottle. The chest strap with a whistle buckle help you to lock your backpack in place securely. It is also a business casual daypack when remove the metal internal frame, large capacity and lightweight help you to cover all possible social situations. Cambered skidproof zipper head,unique embroidered logo, the details of the deal are reflected in fashion and quality of the perfect combination, elastic rope ring is convenient to hang some lighter items.