5.5 oz.(US) 9.2 oz.(CA), 50/50 preshrunk cotton/polyester; Heather Sport colors: 65/35 polyester/cotton; DryBlend technology: delivers moisture-wicking properties; Seamless double needle 3/4 collar; Taped neck and shoulders; Double needle sleeve and bottom hems; Quarter-turned to eliminate center crease; Safety Green: Compliant with ANSI / ISEA 107; CPSIA Tracking Label Compliant