SIDELINE PERFORMANCE. The Nike Dri-FIT UV Polo is a sideline favorite with coaches and staff alike. It's made at least 75% recycled polyester fibers and has sweat-wicking technology that keeps you dry and comfortable under the sun. Nike Dri-FIT technology moves sweat away from your skin for quicker evaporation, helping you stay dry and comfortable. Rolled-back shoulder seams and a drop-tail hem create a professional profile. Vents at the hem let you move freely. 100% polyester