Personalized I Think Therefore I Run Women's V-Neck T-Shirt. I Think Therefore I Run! Those who think use their brains and make a difference in the world, and those who run make a difference in themselves! Great gift for your favorite deep thinker and athlete. 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