4.3 oz.(US) 7.5 oz.(CA), 100% preshrunk combed ringspun cotton, 30 singles,Heather Grey is 90/10 cotton/polyester,Heather Colors are 35/65 cotton/polyester,Semi-fitted,High stitch density for smoother printing surface,Shoulder-to-shoulder taping and seamed collar,Double-needle bottom hem,Ribbed sleeve cuffs,Oeko-Tex� Standard 100 Certified,TearAway� label