Genuine pumice is a natural substance made out of volcanic rock. This raw material has been found to be the best solution to remove hard rough spots and stains from the body. Pay special attention to the heels, elbows and sides of fingers. Use after a bath while your skin is soft rubbing hard skin very gently and lightly. Use with soap or bath/shower gel. Follow up with moisturiser. Never use on bunions, corns or on broken or infected skin.