Personalized Funny Mountain Biking Quote for Biker Toddler Full Zip Hooded Jacket. Humorous mountain biker slogan for a laugh says is my mountain bike okay. 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.