Our all-new Ezeefitskins™ bootie is slightly thicker (0.087 mm) than our Ultrathin material, but it's considerably softer and much stretchier. It also has a microfiber interior (the logo goes on the outside) that feels like silk against your skin. The new Skins material also offers a bit more padding than our current Ultrathin material, but doesn't take up any more space. The light gray color disappears under a sock.