4.5 oz./yd² (US) 7.2 oz./L yd (CA), 100% ring-spun cotton, 31 singles; Heather Grey is 90/10 cotton/polyester; Heather Dark Grey is 65/35 polyester/cotton; Semi-fitted; Narrow width, rib collar; Taped neck and shoulders for comfort and durability; Side seams; Tear away label; Gildan partners with Better Cotton to improve cotton farming globally; 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 by a mill who partnered with Better Work, Fair Labor Association and was made in a facility that is WRAP certified.