Description Product Name : New Era Black Boston Red Sox MLB Hardball 39THIRTY Cap B65912 - New Era Mens Stretch - MLB Model : B65912 Made of 100% Polyester, Woven This Boston Red Sox MLB Hardball 39THIRTY Cap is exclusive to NewEraCap.com and not available at any other retailer. Get yours today! This Boston Red Sox MLB Hardball 39THIRTY Cap features an embroidered Boston Red Sox logo on front, stitched New Era® flag at wearer's left side and embroidered alternate team logo on the rear. Interior includes branded taping as well as a moisture absorbing sweatband. Stretch fit on closed back.