Personalized Mechanical Engineer Line Long Sleeve T-Shirt. Mechanical engineer text with a decorative line sporting a gear is a fun gift design for college students and mechanical engineers at back to school, 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