Vintage St. Louis Cardinals fitted ball cap, size 7 1/2, made by AJD, 100% nylon double knit, the "PROFESSIONAL" baseball cap, Major League Baseball officially licensed product.  6 vent holes in the top, embroidered white STL logo with navy blue outline.  Reasonably stiff fabric and brim, no stains or significant wear, does not appear to be unworn, but there is some yellowing on the white portions of the inside band.