This is made out of natural volcanic lava. Volcanic lava is known to be the best material for the use of exfoliating hard rough spots of the body. Pay special attention to the heels elbows and side of fingers.
Wet the skin area and apply soap or bath/shower get. Wet the volcanic stone and rub it against the skin area. Wash the skin area. Dry & follow up with moituriser.
Never use on bunions corns or on broken or infected skin.
Store in a clean dry place.