5.5 oz./yd², 100% ring-spun USA cotton, 24 singles; Heather Grey is 90/10 ring-spun cotton/polyester; Other Heathers are 50/50 ring-spun cotton/polyester; Reactive-dyed for longer lasting color; Pre-washed to minimize shrinkage; Ribbed crewneck collar; Taped neck and shoulders; Double-needle stitching on bottom hem; Ribbed cuffs; 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 ; ;