The black unisex FLOCK SHOES are made of white and pylon soles. The nylon sole makes it flexible and light. It helps to increase the performance of the workouts. The chevron details on the sides add movement to the design of these performance shoes. The upper surface helps the feet breathe. Polyurethane Faux Leather Upper, Fylon Sole; It is strongly not recommended to wash the shoes in the washing machine. It can be wiped with a damp cloth to remove stains and dirt from the surface of the shoes.