7.2 oz./yd, 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 100 Socially Conscious Manufacturing - This product was made in a facility that holds a SMETA audit certification.