This fan shirt has the official Major League Baseball insignia on it.  It seems to be cotton/polyester and is buttoned, not pull-over.  If you want to see it opened and on a hanger you have to beg.  I am reluctant to take it out of its original package. The listing is making me say that it is a T-Shirt or it won't post but it is a buttoned, short-sleeved shirt!