Personalized Chemical Eggineer Newborn Layette. Eggineers are engineering eggheads and this humorous egghead with safety glasses and beaker of chemicals and the text chemical eggineer, is a fun gift design for birthdays, holidays and graduation. 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