8 oz.(US) 13.3 oz.(CA), 50/50 preshrunk cotton/polyester; Heather Sport colors: 40/60 cotton/polyester; 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; CPSIA Tracking Label Compliant; Tearaway label