Totally perfect blend of cotton and poly. | 4.3-ounce (145 GSM) 60/40 combed ring spun cotton/polyester, 34 singles 90/10 combed ring spun cotton/polyester (Light Heather Grey) 1×1 rib knit neck Shoulder to shoulder taping Tear-away label All heather colors (except for Light Heather Grey) in this product are transitioning from a 50/50 cotton/polyester blend to a 60/40 cotton/polyester blend. Your order may contain a combination of both contents.