4.2 oz./yd², 100% Airlume combed and ring-spun cotton, 32 singles Athletic Heather is 90/10 Airlume combed and ring-spun cotton/polyester Dark Grey Heather is 52/48 Airlume combed and ring-spun cotton/polyester Neon colors are 3.6 oz./yd², 52/48 Airlume combed and ring-spun cotton/polyester, 40 singles Pre-shrunk Unisex sizing Retail fit Side seams Tear away label This 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.