7.2 oz./yd², 100% open-end USA cotton, 18 singles; Heather Grey is 90/10 ring-spun cotton/polyester; Reactive-dyed for longer lasting color; Pre-washed to minimize shrinkage; Ribbed crewneck collar with Lycra; Taped neck and shoulders; Side seams for size 4XL; Double-needle stitching on sleeve and bottom hem; Tear away label; USMCA certified; This product meets the following Sustainable Style subcategories:Sustainable Manufacturing: This product meets the OEKO-TEX Standard 100Socially Conscious Manufacturing: This product was made in a facility that holds a SMETA audit certification