Personalized Dirt Biker Vintage Superior Long Sleeve T-Shirt. Dirt Biker Long Sleeve T-Shirt - Black gift has a vintage crown logo with Superior Dirt Biker retro slogan. 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