Personalized Beer Shamrock Heart T-Shirt. Green beer text in a heart made of shamrocks is a unique gift design for St. Patrick's Day, birthdays and the winter holidays 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.