This bag mounts directly to the luggage rack, sissy bar or passenger seat with quick release and self-fastening straps. Features an additional 3" expansion section that provides extra storage for longer trips.; Industry leading UltraMax fabric for maximum UV protection Mounts directly to the luggage rack, sissy bar or seat using quick-release and self-fastening straps Divided upper and lower storage compartments with lockable zippers Rigid construction and solid base panel prevents sagging Front pocket folds down to provide easy access to the main compartment Contains an additional 3" expansion section and 3 generous outer pockets Carrying handle for easy transportation off the bike Reflective piping enhances visibility Waterproof rain cover included Lifetime manufacturer warranty Main compartment dimensions: 15"L x 12"W x 12"H, 35.5 liters capacity Top compartment dimensions: 15"L x 12"W x 6"H, 18 liters capacity