Personalized Pi Day Funny Apparel Women's V-Neck T-Shirt. I Love Pi Day Women's V-Neck T-Shirt - Pink with cute pie slice filled with math symbol. 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