Our additional step is to be stuck on the seat foam by means of a simple and efficient self-adhesive.It changes the seat foam shape to give the rider a better control on his bike, mainly during the accelleration. It changes the seat foam shape to give the rider a better control on his bike, mainly during the accelleration. For a correct fitting it might be necessary to trim off any possible exceeding foam parts, thus adapting it to the various seat shapes. You can fit it using the original seat cover, too. It is made our of the same material of our seat foams so it is water-repellint. An efficient self-adhesive is supplied in the pakage.