43% nylon XS(M 4-5.5 W 5.5-7) S(M 6-7.5 W 7.5-9) M(M 8-9.5 W 9.5-11) L(M 10-11.5 W 11.5-13) XL(M 12-13.5 W 13.5-14) Dri-FIT technology helps keep you dry and comfortable. Zonal cushioning helps protect against impacts Lightweight mesh for enhanced breathability. Dynamic arch bridge for a supportive fit Reflectivity for enhanced visibility. Left/right specific for enhanced fit This high-performance, microfiber, polyester fabric wicks sweat away from the body and moves it to the fabric surface, where it evaporates. As a result, Dri-FIT fabric helps you stay dry and comfortable.