Personalized I'm A Big Bro Dinosaur Boys Brother Announcement Infant Romper. Adorable boys I'm A Big Bro dinosaur Infant Romper - Pink for your son when a new baby joins the family. Meet your new favorite outfit! Keep dressing simple with this one piece, lap shoulder t-romper. Super soft and perfect for baby's sensitive skin. 5.5 oz. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40; Heather is 90/10 combed ringspun cotton/polyester)