JERZEES: variety and style you love. Preshrunk 100% Cotton, 6-oz., with shoulder-to-shoulder tape. This shirt has a 1x1 ribbed crewneck collar, double-needle cover-seamed neck, sleeves and hems, set-in sleeves and a seamless body. Birch is 98% cotton/2% polyester and light oxford is 90% cotton/10% polyester.