• 100% combed and ring-spun cotton • Athletic Heather is 90% combed and ring-spun cotton, 10% polyester SIZE LENGTH WIDTH S 20 ⅞ 15 ¼ M 22 ⅛ 16 ¼ L 23 ⅜ 17 ¼ XL 24 ⅜ 18 ¼ Product measurements may vary by up to 2" (5 cm).