Topsheet

The outward layer of rubber in a sandwich rubber. It can be used with the pimples of the rubber facing out so that the smooth surface of the topsheet is glued to the sponge, and the pimples are used to hit the ball, or it can be used with the pimples facing in so that the smooth surface of the topsheet is used to hit the ball.

When no sponge is used, the topsheet is usually just known as the rubber. In this case, the smooth side is always glued directly onto the blade, so that the pimples are used to hit the ball.