Personalized Cute Cow with Shamrocks St Patrick's Day T-Shirt. Celebrate St Patrick's Day with this adorable design featuring a cute cow surrounded by shamrocks. Perfect for adding a touch of charm to your T-Shirt - Red. 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.