Personalized Funny Trucker Joke Thinking About Trucking Long Sleeve T-Shirt. funny truck driving slogan with truck silhouette says If Im not trucking Im thinking about it 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