Hydrate fast on longer rides with this stable, lumbar-style bike pack featuring an integrated low-profile Hydraulics (TM) 1.5L LS Reservoir and magnetic bite valve attachment. Ride comfortably with a bike-specific airmesh wrap hipbelt and close-to-body AirScape (TM) backpanel. Dual hipbelt pockets hold snacks, while vertical straps secure a chin guard or extra layer for added versatility. Osprey Seral 7 Bike Hydration Lumbar Pack | Black | Christy Sports