Function: Our Pumice Stones can gently effectively remove unwanted skin, hair and calluses.you will have beautiful, smooth and silky feet. Warning: Be careful not to use on broken skin or use too frequently. Pumice Stone for feet Using Method : Simply rub onto the surface of the skin using circular motions, naturally massaging and removing dead and dry skin. Design: a durable string attached to stones to help stones air-drying after use. Material: pumice stone is a natural porous stone .keep you feet feeling smooth by rub on the skin.