Personalized Funny Mountain Biking Quote for Biker Infant Romper. Humorous mountain biker slogan for a laugh says is my mountain bike okay. 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)