4.2 oz./yd² (US) 7 oz./L yd (CA), 100% Airlume combed and ring-spun cotton, 32 singles Athletic Heather is 90/10 Airlume combed and ring-spun cotton/polyester Additional Heather is 52/48 Airlume combed and ring-spun cotton/polyester Pre-shrunk Side seam 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.