NIKE Men's Victory Color Block Swim Brief 81% nylon/ 19% spandex The Victory Color Block Brief from Nike is made from Nike NX fabric. Nike NX is made from a highly durable, nylon and chlorine resistant spandex blended to handle the rigors of training and competition. It is built for superior shape retention to provide the support you need for a confident fit, so no matter how hard you go, Nike NX is your strong suit.