The Unisex Jersey Tank (Neon Yellow) (Medium) 100% Cotton 30-single 100% combed and ring-spun cotton (4.2-oz.). Athletic heather: 90% combed and ring-spun cotton/10% polyester (4.2-oz.). Triblends: 40-single 50% polyester/25% combed and ring-spun cotton/25% rayon (3.4-oz.) with 40-single rib-trim cuffs. Neons: 40-single 52% combed and ring-spun cotton/48% polyester (3.6 oz). Available in sizes XS-2XL.