This Authentic Collection 59FIFTY is the official on-field cap of Major League Baseball and is worn by every Major League Baseball player. Performance is enhanced through CoolBase technology featuring revolutionary wicking, superior drying, and shrink resistance. Designed with an embroidered (raised) Boston Red Sox team logo on front and stitched Major League Baseball logo on the rear. Interior includes branded taping as well as a CoolBase moisture wicking black sweatband. Fitted, closed back.