MEN'S PREMIUM LONG SLEEVE FABRIC24 single, 5.5 oz., soft-washed, 100% combed ring-spun cotton, except Athletic Heather (85%/15% cotton/viscose), Black Graphite Heather (80% cotton/20% polyester), and all other Heathers (60% cotton/40% polyester).FEATURESUltra soft hand, side-seamed, tightly knit.