You'll become an Einstein with E=mc2 Proof T-shirt
E=mc2 T-shirt is a must have for any science, physics or Einstein buff! Learn how to derive Einstein's famous proof equation with this T-shirt that features step by step derivation proving E=mc2. Einstein t shirt makes the perfect gift for the genius in your life. Ash 99% cotton/1% polyester T-shirt. Questions about sizes? (#1783) A ComputerGear exclusive. Item in stock unless noted above.