NIKE Core Compression Men's Long Sleeve 449794-891 Large Size Body: Dri-FIT 90% polyester/10% spandex. Mesh: Dri-FIT 91% polyester/9% spandex Imported Dri-FIT fabric wicks sweat away to help keep you dry and comfortable Rib crew neck with interior taping for comfort and durability Mesh panels for enhanced breathability Stretch fabric for a compression fit that moves with you Flat-seams to help minimize irritation from chafing