Anti-theft waterproof backpack 100% polyurethane, 30cm x 20cm x 50cm, with a capacity of 30 L. With removable elastic net, helmet holder, code lock system and anti-theft cable. Back zipped pocket, zipped side pockets with USB and micro-USB port, multiple interior pockets including for bottles and power bank. It has an interior compartment for a computer and a tablet, as well as padded reinforcement for the back and adjustable shoulder straps for greater comfort.