The "Amateur Boxing" racing shorts Adidas are excellent for racing and training. These shorts are comfortable and have a manufacturer to hold. Designed from 100% lightweight polyester. TECHNOLOGY CONCEPT: The construction of DIAMOND FLEX fabric is unique of its kind. This specific material has been developed by adidas, in order to include all the properties that top karate fighters expect from their kumite karategi : ultra-lightness, stretchable capacity, and ultra fast-dry property. This exclusive fabric has been designed to optimize the performance of movements of a karate fighter.