Personalized Coolest Engineer Long Sleeve T-Shirt. A snowman wearing a hard hat with text the world's coolest engineer is a humorous engineering design. Fun gifts for college students and engineers for birthdays and the winter 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