Material: Plastic, featuring ultra-light, wear-resistant, low-friction force. It can effectively prevent damage to the eyes and face due to breakage and friction of the frame of the movement, and the metal hinge is more stable.   The blue light-blocking lens effectively blocks UV radiation, provides 100% UV400 protection, filters harmful blue light, and is suitable for wearing and watching a computer while watching TV. Design: hiking frame, classic design, unisex, high transparency frame, elegant