US) 13.3 oz.( CA), 50/50 preshrunk cotton/polyester. Heather Sport colors: 60/40 polyester/cotton. Air jet yarn = softer feel and reduced pilling. Double needle stitching at shoulder, armhole, neck, waistband and cuffs. 1 x 1 rib with spandex. Quarter-turned to eliminate center crease. Safety Green: Compliant with ANSI / ISEA 107. Tearaway label.