Personalized Funny Mountain Biking Gravity Joke Infant Romper. This cycling design for someone who enjoys mountain biking has bike and mountains silhouette and gravity joke. 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)