Personalized Math Brain Men's V-Neck T-Shirt. Math text with a happy brain is a humorous design for mathematicians, students and teachers of math. Fun gifts for birthdays, holidays, back to school and graduation. 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