Personalized Unicycle Irish Shamrock Newborn Layette. A unicycle against an image of an Irish shamrock is a unique Irish gift design for bicyclists on birthdays and St. Patrick's Day. 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