Backpack anti-robo the closure of the main pocket is completely hidden preventing it can be opened without you being aware Small closure on one of the straps to have hard and quick access Interior with mltiples separators and organizers ms storage space Suitable for laptops up to 156 USB external port for cell phone loading tablets and laptops Outer material of inner polyester 210D The design includes safety reflective strip Dimensions 31 x 13 x 45 cm