Nike Men's UWW Referee SS Polo - Black - (Required UWW Referee Uniform) The Nike Dri-Fit jersey provides on the mat comfort with a classic look. Its 3-button placket offers an adjustable fit for match day. Dri-FIT technology helps you stay dry, comfortable and focused. 3-button placket for easy on and off. Swoosh design trademark at the upper chest, full color UWW Referee Badge upper chest, United World Wrestling word mark across shoulders on back.