Personalized Smart Mechanical Engineer Youth T-Shirt. Youth T-Shirt - Pacific Blue with "Mechanical engineering, the profession for intelligent people" in rough text with the M in mechanical wearing a hard hat make a funny design with attitude for college students and engineers at back to school, birthdays, holidays and graduation. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.