Designed for every type of riding and every style of bike, the tunnel bags will fit everything from sport bikes to cruisers and everything in between. The aerodynamic shape and rider-convenient features make stashing your gear easy and does it with leading-edge style. The tunnel bag attaches to almost any rear seat or pillion up to 12-inches wide with an included mounting system, and additional straps for extra security. Once secured to the rear seat area, the bag can be removed and re-attached to the bike within seconds using a series of cam locks on the outside of the bag. Fits ALL bikes with a 12-inch wide or smaller rear seat / pillion. Large main compartment spacious enough for laptop or notebook computer. Three big exterior pockets allow easy access when on the go. Two of the exterior pockets expand an additional two-inches for extra storage.