65% Polyester for durability, and 35% Cotton for comfort. . 210gsm pique fabric, easy care and reduced pilling. Knitted collar with reinforced herringbone tape on inside neck seam and JB’s 2-button placket. Set-in sleeves with open cuffs. Straight hem with herringbone tape reinforced side splits. Complies with standard AS/NZS 4399:1996 for UPF Protection.