Personalized Math Genius Frog Men's V-Neck T-Shirt. A happy green frog holding a banner that reads Math Genius is a humorous gift design for mathematicians, math school teachers and students. 4.7 oz., 100% pre-shrunk cotton Narrow, set-in 1x1 mitered V-neck collar Shoulder-to-shoulder taping Double-needle stitched sleeves and bottom hem