X Crazyfast is designed for the athlete who will be faster than ever and the masterpiece from adidas, will undoubtedly revolutionize speed boots forever Coated upper in light textile consisting of a minimum of 50% recycled material, which is a step further on the way to a greener future Classic adaptive lacing system and a soft knit edge at the ankle, which makes it easy for all foot types to get in boots quickly This is a shoe with “non-marking” outsole that makes it suitable for use on flat, flat indoor courts, made of wood or synthetic material.