Personalized Coolest Environmental Engineer Newborn Layette. 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. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months