High-density black rubber backrest for the Givi E450 or E35 luggage case. Perfect for increasing passenger comfort while riding. Contoured to relieve aches and fatigue.Mounts using included studs and nuts. Requires minor drilling of the topcase using the supplied paper template. Passenger comfort results may vary based on motorcycle profile, passenger size, and topcase positioning. Five Stars topracks tend to mount closer and lower than the Givi Wingracks, which affects topcase position.