You will not believe how much difference to the noise levels this pad will make. Once fitted, and you shut the bonnet, it makes a "thud" rather than the normal "clang". The pad is made up of a heavy duty black PVC with a felt backing and then we add another layer of felt too. The pad is then sewn in a quilted fashion and then the edges are bound in leathercloth material. We supply a tube of high temperature adhesive.