Personalized Funny Mountain Biking Gravity Joke Toddler Full Zip Hooded Jacket. This cycling design for someone who enjoys mountain biking has bike and mountains silhouette and gravity joke. 7.5 oz., 60/40 cotton/polyester. Jersey-lined double-needle hemmed hood. Pouch pockets for all their treasures. Coverstitched shoulders and armholes. Coverstitched rib waistband and cuffs.