Hats measurements taken from Carhartt website, are expressed in inches, & are approximate. Size MEDIUM/LARGE Hat measurement= 7-7¼ HEAD MEASUREMENT =22 – 22¾” When the forecast says light rain, this cap helps keep you dry 97% Cotton / 3% Elastane stretch canvas Tricot lined with 100g insulation in the crown and earflap Unstructured, low-profile cap Rain Defender® durable water repellent finish keeps you dry in light rain FastDry® sweatband wicks sweat and dries fast Earflaps can be tucked up when not in use Carhartt label sewn on front Rain Defender®, Durable water repellent—water beads up and rolls off. Rain Defender® durable water repellent garments are just as functional and comfortable while fishing, hunting, working, or standing on the sidelines at a football game in a sudden November rain. Water will bead up and roll off your sweatshirt, jacket, overalls, pants, and more, so a little rain won’t stop you from finishing the job without changing your gear.