Make the bottom of the feet clean and dry by using this Beach Invisible Stick-Up Foot Insole Waterproof Protective Socks Pad at $2.29. It is insulation for beach and street and anti-slip effect for yoga event, swimming, SPA and so on, in this hot summer. An insole that can stick on feet. Nano technology, ultralight material, do no harm to human. Thermal insulation, waterproof, anti-cut and anti-slip. Invisible design and well protecting your feet. Easy to put it on and off, reusable can be repeatedly used. Can be used on beach, seaside, swim, run, climbing etc.