SWEAT-WICKING PERFORMANCE FOR THE PITCH.The Nike Dri-FIT Park 7 JBY Jersey features smooth, sweat-wicking fabric with mesh on the back to help keep you dry, so you can stay focused from the opening whistle to the 90th minute.This product is made with 100% recycled polyester fibers.Dri-FIT technology helps keep you dry and comfortable.Mesh on the back adds breathability.Composition:100% Polyester.