Aquabourne EOS Commuter Bike Cycling Backpack with Integrated LED Safety Light Polyester Eos commuter cycle backpack with integrated safety light and laptop / tablet compartment Lightweight highly durable 1000D soft polyester shell with a water resistant coating and features a top fold over flap to avoid water ingress via zip. Integrated LED light which is powered by 2 x AA batteries (not included) and has 3 function modes; solid light, slow flash and fast flash Laptop compartment to fit up to 15 " and a larger main compartment for change of clothes etc Padded backpack straps, and adjustable chest strap. Measures 50x33x18cm with a 30l capacity