The first 180° rotatable 2-in-1 sunglasses in the world, a revolution of traditional eyewear that is fashionable and functional at the same time. It functions as two pairs, efficiently reducing waste in production and consumption. The reflective brown lens provides clear eyesight for car driving and the silver lens for outdoor activity, via absorbing visible light. Lenses can be easily exchanged at home according to the user’s demand. One revolutionary feature is the 180° rotatable frame design, made of light-weighted high-elastic carbon composite. The Y-shaped support is easy to flip upside down so as to be worn in two degrees.