PREMIUM LIGHTWEIGHT BREATHABILITY The Nike Dri-FIT Knit Sleeveless Men's Running Shirt is made with body-mapping mesh panels for strategic ventilation over any distance. Benefits Dri-FIT fabric to wick away sweat and help keep you dry and comfortable Rib crew neck with interior taping for a comfortable fit Mesh panels at chest, sides and center back for breathability in key areas Wide rib armholes for nonrestrictive comfort Product Details Fabric: Body: Dri-FIT 53% polyester/47% nylon. Center front/back panels: Dri-FIT 51% polyester/49% nylon. Side panels: Dri-FIT 52% polyester/48% nylon. Machine wash Imported