Personalized Funny Mountain Biking Gravity Joke Women's V-Neck T-Shirt. This cycling design for someone who enjoys mountain biking has bike and mountains silhouette and gravity joke. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit