100% 600DPolyester of which 50% recycled polyester Anti-theft backpack Reinforced cut-proof front panel Back zip closure with TSA combination lock Back-protected quick-access zipped pocket Adjustable shoulder straps and sternum strap 2 zipped pockets on the shoulder straps 2 straps on bottom to hold jackets or sweaters 2 side pockets 1 side pocket with built-in USB port connected to inner power bank holder (inner micro USB cable provided) 1 side pocket with theft-preventing coiled cable to attach the backpack to table/chair leg Inner compartment with padded laptop sleeve for laptops up to 15 inches Padded tablet sleeve for tablets up to 11 inches 2 mesh zipped pockets 2 detachable zipped pouches for cables or accessories 2 inner pockets. including 1 for bottles or flasks and 1 for storing a power bank Integrated Rain Cover