The Black and white ROCK® Sock sneaker has an upper made of Flyknit, quick lacing with drawstring closure, rubber reinforcement on the heel, and double "tabs" on the front and back for a quick shoes fitting. The sole is made of 51% recycled material and the cork insole is removable and washable. It is a hard-bottomed sneaker but still lightweight. The Flyknit upper assures great softness and comfort on any occasion