Fabrication: Solid colors are made from 100% Airlume combed and ring-spun cotton; Ash color is 99% Airlume combed and ring-spun cotton, 1% polyester; Heather colors are 52% Airlume combed and ring-spun cotton, 48% polyester; Athletic Heather and Black Heather are 90% Airlume combed and ring-spun cotton, 10% polyester.