This bike backpack for budding cyclists features the deuter Airstripes back system for a snug fit, full freedom of movement and effective ventilation across the back even on the most fast-paced cycle tours. A wide zip around opening provides easy access to the main compartment, with dedicated space for a 2-liter hydration system. While a cell phone and energy bars etc. are can be stored inside the stretch mesh front pocket or zippered side pocket, at the ready. And for added safety in low light, the Junior Bike has reflective details.