Personalized Coolest Environmental Engineer Youth T-Shirt. The world's coolest environmental engineer with a snowman wearing a hardhat and holding the earth is a humorous gift design for engineers and college students at 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.