Personalized Math Smile Women's V-Neck T-Shirt. A smiling face made from math text with the caption, Makes me smile is a humorous gift design for mathematicians, math students and teachers at back to school, graduation, birthdays and holidays. 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