1. The double-sided surface is usually designed a little curved in order to make a better fitness to the shape of your feet for comfortable use. Having two different grades of coarseness,the surface is often made of waterproof sandpaper.
2. The wide size of the surface makes it comfortable and easy to make your feet smooth. Moisture your skin first, the waterproof foot file, being safe and gentle, yet instantly eliminate thick,callused skin and produce baby-soft, smooth feet in seconds.
Meterial ：Plastic + Sandpaper
Size ：one size