4.5 oz., 60/40 combed ringspun cotton/polyester, 30 singles,Black/White and White/Black are 100% combed ringspun cotton,Two contrast stripes on sleeves,Front yoke,Ribbed collar,Shoulder to shoulder self fabric back neck tape,Double-needle hem sleeves and bottom,Side seam construction,CPSIA compliant tracking label in side seam,EasyTear� label