Personalized Dirt Biking Motocross Racing Women's V-Neck T-Shirt. Dirt is for racing asphalt is for getting there funny dirt biking design for someone who enjoys racing offroad. 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