New with tags! - 1.5liters or 50 fl oz. Hydration pack - Great for all bike rides - Lets them stay hydrated while on the move - Crux Reservoir with standard exit port: offers 20% more water with every sip, easy on/off lever, Big Bite Valve, HydroGuard technology, ergonomic handle, and leak-proof cap - BPA/BPS/BPF Free - Stretch overflow storage for extra items and gear - 3 Exterior pockets for plenty storage - Mesh shoulder straps to keep cool - Safety whistle in sternum strap for added safety - Reflective strips increase visibility