Light Weight Polyester construction Athletic Construction Also AIBA Approved Great top for everyday training and competition. The New Micro Interlock Fabric is 100% polyester, is extremely light and keeps you cool and dry. The top has an athletic cut and is unisex and has a heat transfer adidas logo. adidas AIBA approved products were officially used in 2008 and 2012 Olympic games. This style is available in AIBA red & Blue colors as well as in other colors.