Personalized Coolest Mechanical Engineer Long Sleeve T-Shirt. The world's coolest mechanical engineer text with a snowman holding a gear and sporting a hat and scarf with gears is a humorous engineering gift design for birthdays and holidays. 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