Personalized Quantum Mechanics Building Blac Women's V-Neck T-Shirt. Quantum Mechanics Building text with you are here arrows pointing to two different locations is a humorous quantum physics design for science geeks at back to school, birthdays, holidays and graduation. 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