Dr. Scholl’s Hard Skin Remover Nano Glass Foot File is specially designed with advanced nano glass technology to file and smooth at the same time. The textured nano glass surface glides on the soles of your feet to easily remove hard and rough skin leaving feet feeling smooth soft and looking healthier. Exfoliation with little effort! Multi-directional grinding points buff and smooth hard skin. Washable and Reusable and Waterproof!