Mark the milestone and celebrate Mets greatness with the New Era Mets 9FIFTY A-Frame Curve 40th Cap. Built for true fans, this cap features durable, woven polyester that offers a comfortable feel and a sharp, structured look that stays fresh from the first pitch to the final out. Wherever you go, rep your New York Mets pride with the New Era Mets 9FIFTY A-Frame Curve 40th Cap.