Personalized Motocross BMX Dirt Biking Baby Bib. Silhouette dirt biker Baby Bib - White and Green on retro style background for someone who enjoys motocross BMX. Our Baby Bib is rated high in convenience and durability and with a variety of fashionable colors, your baby can be trendy. Mix and match to any outfit. 100% cotton ring spun combed heather colors are cotton-poly. Width 7.75", Length 11.75"