Personalized Dirt Biking Motocross Racing Long Sleeve T-Shirt. Dirt is for racing asphalt is for getting there funny dirt biking design for someone who enjoys racing offroad. 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