100% ring-spun cotton and is soft and comfy. Double stitching on the neckline and sleeves add more durability • 100% ring-spun cotton • Sport Grey is 90% ring-spun cotton, 10% polyester • Dark Heather is 65% polyester, 35% cotton • 4.5 oz/yd² (153 g/m²) • Pre-shrunk • Shoulder-to-shoulder taping NWO Logo on outside back logo