Personalized World's Coolest Mechanic Long Sleeve T-Shirt. World's coolest mechanic text with the image of a snowman is a funny gift design for birthdays, holidays and graduation. 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