6.5 oz./yd², 100% ring-spun US cotton, 24 singles; Sport Grey is 90/10 cotton/polyester; Made with our soft ring spun cotton and cotton blends, Hammer's double pique fabric is durable and ideal for embroidery; Modern classic fit; Contoured welt collar and cuffs; Rolled forward topstitched shoulder; Clean finished placket with dyed-to-match buttons ; Side vents; 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 in a facility that utilizes the Higg Index and has implemented Level 2 practices or above, was made by a mill who partnered with Fair Labor Association and was made in a facility that is WRAP certified.