4.5 oz./yd², US grown, 100% ring-spun cotton, 30 singles Ash and Marbled colors are 99/1 cotton/polyester Light Steel and Red Pepper Heather are 90/10 cotton/polyester CVC - all other heather colors are 60/40 cotton/polyester Pre-shrunk Modern fit Clean Canvas Technology for superior printability Set-in narrower ribbed collar Double-needle hem and sleeves Shoulder-to-shoulder taping Black tear away label This product meets the following Sustainable Style subcategories:Sustainable Manufacturing: This product was made in a facility that is run by at least 50% renewable energySocially Conscious Manufacturing: This product was made in a facility that utilizes the Higg Index and has implemented Level 2 practices or above, and was made by a mill that has partnered with or is accredited by the Fair Labor Association