The Hands Free Slip-Ins sneakers feature an upper made of breathable functional mesh. The Heel Pillow keeps the foot secure and firmly in place, and combined with the Air-Cooled Memory Foam insole, the lightweight and responsive ULTRA GO cushioning, and the multi-layer flexible Flex Pillars traction layers for cross-training, they provide an exceptionally soft and exclusive wearing comfort. Shoes can be washed in the washing machine; please follow the instructions.