Vintage St. Louis Zoo Men's Blue Denim Casual Short Sleeve Shirt XL Collared Button up. Shirt is vintage (pre-2004) pre-owned. Please see all photos for visible condition. Pocket front left chest. Port & Company. Embroidered logo on front. 100% cotton. Approximately 28.5 inches long x 26 inches pit to pit. Great collectible and nostalgic shirt!