Personalized Coolest Mechanic Youth T-Shirt. The world's coolest mechanic text with a snowman holding a wrench and sporting a hat and scarf with wrenches is a humorous mechanic gift design for graduations, birthdays and holidays. 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.