Pumice Stone is made from natural volcanic rocks. it can effectively remove dead skin and dirt from the feet, leaving you with a smooth, callous free foot. It is oval and has many bubbles and holes on its surface.
Rinse with water for the first time. Soak in boiling water for 2-3 minutes. Hot water soak for 15-20 minutes, use pumice to gently rub the soles of the feet for a few minutes, and the horny will fall off.