Drop-off Location Finder for Nike and Converse stores. For unwearable, un-donatable athletic shoes only to be recycled (not reused). After shoes are dropped off, they are transported to facilities, where each shoe is cut into three slices – rubber outsole, foam midsole and fiber upper. These slices are then fed through grinders and purified. The result is Nike Grind Rubber – made from the shoe’s outsole and used in track surfaces, interlocking gym flooring tiles and playground surfaces.Nike Grind Foam – made from the shoe’s midsole and used as cushion for outdoor basketball and tennis courts, as well as futsal fields.Nike Grind Fiber – made from the shoe’s fabric upper and used in the creation of cushioning pads for facilities like indoor synthetic courts and wood courts.