Front opening is hinged for easy access Doubles your dresser trunk capacity and provides a full support backrest when completely packed.  Mounts on passenger seat.  Exceptionally stable mounting system. Constructed of durable 1680-denier ballistic nylon material and insulated with high-density closed-cell foam. External organizer located on side pocket. Easy-access side pockets. There is 3 side pockets. Built-in bungee-bottom external rain cover. Rigid design maintains shape when empty. Padded backpack straps stow in their own zippered compartment. Dimensions: 17in.W 18in.H x 12in.D (2.13 cu. ft. plus side pockets)  Please review the images!