Ultra fast, durable mounting system with a fully adjustable sissy bar strap rig that easily attaches your travel bag to your luggage rack, or sissy bar. Strong Durable blend of heavy thread fabric with a rigid structure maintains bag shape. Padded back rest for the passenger or the driver. Detachable Back Pack Strap for ease of carrying. Easy, spacious top-loading compartment can hold a helmet & more. Large top-loading main compartment for more luggage & accessories. Padded storage compartment inside main compartment easily stores and protects your laptop or other fragile valuables. Two large organizer net pockets inside. Five external pockets. Two expandable side pockets with organizers inside the pocket and on the outside-4 mesh pockets total. Rain cover with security tether included. Top exterior flap can be used and adjusted for carrying a jacket or leather shirt. Lockable zippers for added security. Constructed of a very durable heavy denier nylon thread that is UV protected, water-weather resistant Reflective Piping for added visibility and safety. Measures: 15" H x 11" W x 10" D