E = mc2 is the equation in German-born physicist Albert Einstein’s theory of special relativity that expresses the fact that mass and energy are the same physical entity and can be changed into each other. In the equation, the increased relativistic mass (m) of a body times the speed of light squared (c2) is equal to the kinetic energy (E) of that body Our E=MC Squared T-shirt is digitally printed using the latest production techniques onto a 100% Organic ring-spun combed cotton T-shirt so it not only looks amazing but you can also be confident that it is sustainable and ethical Product Features: Designed & produced in our Cambridge UK studio 100% organic ring-spun combed cotton made under the FairWear Foundation guidelines PETA Vegan Approved Set-in sleeve 1x1 rib at neck collar Sleeve hem and bottom hem with wide double needle topstitch