Personalized Cute Cow 3rd Birthday T-Shirt. Whether you're throwing a cowboy, farm, or rodeo themed party, our cute cow design is sure to be a hit with the birthday boy or girl and their guests. 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.