1x1 rib with spandex for enhanced stretch and recovery. 8 oz./yd² (US) 13.3 oz./L yd (CA), 50/50 cotton/polyester. Double-needle stitching at shoulders, armholes, neck, waistband and cuffs. Classic fit. Tear away label. Heather Sport colors: 60/40 polyester/cotton. Safety Green: Compliant with ANSI / ISEA 107. Air jet yarn for softer feel and reduced pilling.