One of the greatest mathematicians of all time with over 800 publications to his name, Leonhard Euler (1707–1783) also played a decisive role in the development of geometry, calculus, mechanics and number theory. This sleek iPhone case protects your phone from scratches, dust, oil, and dirt. It has a solid back and flexible sides that make it easy to take on and off, with precisely aligned port openings. • Hybrid Thermoplastic Polyurethane (TPU) and Polycarbonate (PC) material • Solid polycarbonate back • Flexible, see-through polyurethane sides • .5 mm raised bezel