This is a smart photochromic sunglass, suitable for men to wear. It is characterized by automatically changing color according to the intensity of ultraviolet rays, and can be used in both indoor and outdoor environments. There is no need to remove it even when driving through a tunnel, which is very convenient. This sunglasses uses an intelligent color-changing factor that changes color evenly. The lenses can sense the intensity of ultraviolet rays and change color accordingly. The high light transmittance ensures clear vision, allowing you to have a good visual experience both indoors and outdoors. These sunglasses have a classic look with a toad design, double bridges and screw-free nylon panels, making them perfect for outdoor activities such as cycling.Lens color: grayTransmittance classification: Category 1/Light-colored sunglassesIs it polarized: NoGlasses structure: full frameAnti-UV level: UV400Applicable scenarios: sun protectionApplicable scene: fishingApplicable scenarios: TravelingApplicable scenarios: outdoor sportsApplicable scenarios: CyclingApplicable scenarios: drivingColor: 1. Black frame turns gray at night visionColor: 2.Silver frame turns gray at nightStyle: Casual styleStyle: sportyStyle: Fashion OLstyle: simpleLens material: nylonFrame material: stainless steelFrame material: stainless steel