Work Hard, Pray Harder100% combed and ring spun cotton (Heather colors contain polyester) Ash color is 99% combed and ring spun cotton, 1% polyester Heather colors are 52% combed and ring spun cotton, 48% polyester Athletic and Black Heather are 90% combed and ring spun cotton, 10% polyester Heather Prism colors are 99% combed and ring spun cotton, 1% polyester Fabric weight: 4. 2 oz (142 g m2) Pre shrunk fabric Side seamed construction Shoulder to shoulder tapingSize