Personalized Funny St. Patrick's Day Cow with Shamrocks and Green Hat T-Shirt. Celebrate St. Patrick's Day with this humorous Highland cow sporting a green plaid hat, shamrock sunglasses, and bow tie. Perfect for adding a touch of fun and Irish spirit to your T-Shirt - Scuba Blue. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.