Personalized Racing Themed 1st Birthday Car Long Sleeve T-Shirt. 1st Birthday race car boys Long Sleeve T-Shirt - Pink has this little racer is one bday slogan with a colorful racing car and number 1 logo. art c. Ne Metzger. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL