Clear lenses have a polarizing effect. Colored lenses have no polarizing effect.   Photochromism only supports exposure to sunlight (ultraviolet rays), please do not use incandescent lamps for testing.   Don't buy the glasses case separately, there are no glasses in the glasses case. Shipping is not supported.   【Introduction to the frame】 The frame adopts geometric design. The rubber nose pads and non-slip temples are soft and comfortable, and fit the face perfectly. The TR90 material frame is soft, durable, not easy to break, highly flexible, and ultra-lightweight.     【Lens introduction】 The photochromic lens changes from light gray to gray under the irradiation of ultraviolet rays (sunlight). The lens is lightweight, tough and not easily deformed. Using 100% UV 400 protective coating can block harmful UVA, UVB, UVC and blue light. These lenses have high definition, impact and scratch resistance, and lightness suitable for all-day wear.   【Features】 Fashionable design, colorful frame, light and flexible, suitable for more face shapes. The lightweight design is very suitable for motorcycles and bicycles, driving, fishing, walking, climbing, hiking or other outdoor activities.