Personalized Quantum Mechanics Building White Men'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. 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