DURABLE:ORICSSON Backpack is made of Unique lightweight waterproof and tear resistant high quality nylon material,comfortable and very convenient to carry,Durable Two-way Abrasion Resistant SBS metal zipper.LIGHTWEIGHT(0.7 Pounds) and ROOMY(35 Liters). Greatly save space.Many compartments pockets for storage-avoid extra fees. In additions, there are 2 phone pockets on the surface of the backpack.(Valid for phone smaller than 4.7