NIKE Men's Dry Contour Running Long Sleeve University RED/Gym RED Large 100% polyester Long sleeve running shirt. Fitted design contours to your body. Dri-FIT mesh fabric is knit from loose to tight for zoned breathability. Mesh opens up down the middle back for optimal ventilation. Seams are rolled forward for a zero-distraction fit. Reflective details enhance visibility in low-light conditions. Crew-neck design provides a flattering, nonrestrictive fit. Fabric: 100% polyester