Marbles are 4 oz./yd², 91/9 polyester/Airlume combed and ring-spun cotton, 32 singles Mineral wash* is 4.4 oz./yd², 100% Airlume combed and ring-spun cotton Solid Black Slub is 40/30/30 polyester/Airlume combed and ring-spun cotton/rayon Pre-shrunk Retail fit Unisex sizing Shoulder taping Side seams Tear away label *Due to the specialized washing process, each shirt is uniqueThis product meets the following Sustainable Style subcategory - Socially Conscious Manufacturing - This product was made in a facility that partnered with or is accredited by the Fair Labor Association and made in a facility that is WRAP and bluesign certified.