Personalized Coolest Mining Engineer Newborn Layette. A snowman holding a shovel and The world's coolest mining engineer text is a humorous gift design for college students and engineers on birthdays and winter 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