Constructed of 300D Polyester and water-resistant material, Features include 2 side mesh pockets, padded adjustable shoulder straps with reflective markings, padded back, adjustable sternum strap and top loop, Padded inside slash pockets hold a 15" laptop and a tablet, Front top easy access zippered pocket, Front zippered pocket features a large RFID pocket, key clip and simple organizer, Built-in USB 2.0 charging port and battery pack compartment, Two security hook zipper heads with water resistant zippers,