Personalized Nuclear Ornaments Circle Newborn Layette. A green tree with radioactive symbols instead of ornaments in a colorful circle is a unique gift design for college students, physicists, environmentalists, nuclear engineers and workers 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