5.5 oz./yd², 100% Airlume combed and ring-spun cotton, 20 singles Athletic Heather is 90/10 Airlume combed ring-spun cotton/polyester Dark Grey Heather and Deep Heather are 52/48 Airlume combed and ring-spun cotton/polyester Pre-shrunk Retail fit Unisex sizing 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 certified.