Personalized Coolest Mechanic 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. Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.