Curling is a simple sport and requires only a few pieces of equipment. Stones, special shoes and brooms are all that is required. The stones are large stones with a concave bottom and a handle on the top. Stones vary in weight, and players will use a certain weight stone depending on where they want the stone to end up. The left and right sole of each shoe is either rubber, for grip, or a smooth surface with little friction, for sliding. The broom is used to sweep the ice in front of the stone to help the stone reach its target.