Personalized Marching Band Pressure Egghead Newborn Layette. A Marching Band egghead with We don't crack under pressure in curved text is a humorous gift design for marching band members and staff. 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