NIKE Dri-Fit Knit Mens Running Short Sleeve Top/T-Shirt 100% Polyester Updated DRI-FIT knit fabric wicks sweat from your body faster and dries more quickly than ever before, helping you stay comfortable throughout your run Textured knit-in mesh panels for increased breathability Reflective details for enhanced visibility in low light conditions and a reflective loop on the upper back to keep media-player cords out of the way The seamless construction feels smooth against your skin The ergonomic design contours to your body for natural range of motion