This trunk is very comfortable for long rides and is also the ideal trunk to protect your items due to its waterproof manufacturing process. It offers a large storage capacity allowing you to fit 2 helmets. Uses rubber latches to close the box that eliminates vibrations between the cover and the base by applying a constant tension on the 2 parts. Central rear light (LED) brake & parking. Comes with a locking system in the center. Portable box sold separately. To eliminate the water infiltration, the box is specially molded between the cover and the bottom section. Will not fit on ATVs with long grab bars on rear rack (hole huner trunk will accept a 20" long x 2-7/8" high x 1-1/2" wide grab bar).