OLLIN1 PREMIUM Mens Classic Short Sleeve Stretchy Pique Polo Shirt 55% Cotton / 40% Polyester / 5% Spandex Breathable, stretchy fabric for comfort Double stitching on bottom hem / Ribbed trim on collar and cuffs 2 Button down placket / Side vents Machine wash cold with like colors / Non-chlorine bleach when needed / Tumble dry low / Cool iron if necessary Relaxed fit; Please look at the measurements below for guidance