8 oz./yd² (US) 13.3 oz./L yd (CA), 50/50 cotton/polyester, 20 singles Heather Dark Green, Heather Dark Maroon, Heather Dark Navy, Heather Deep Royal and Heather Scarlet Red are 60/40 polyester/cotton Safety Green is compliant with ANSI / ISEA 107 high-visibility standards The Heavy Blend collection is now made with finer yarns and new MVS Air spinning technology, that improves the fabric by reducing pilling, enhancing durability and creating a smoother printing surface. Classic fit 1x1 rib with spandex for enhanced stretch and recovery Tear away label Proud member of the U.S. Cotton Trust Protocol Made with OEKO-TEX certified low-impact dyes This product meets the following Sustainable Style subcategories - Sustainable Manufacturing - This product meets the OEKO-TEX Standard 100. Socially Conscious Manufacturing - This product was made in a facility that utilizes the Higg Index and has implemented Level 2 practices or above, was made by a mill who partnered with Fair Labor Association and was made in a facility that is WRAP certified. Gildan Men's Heavy Blend Crewneck Sweatshirt