Product Description Photochromic Technology: These intelligent sunglasses with a lens cycle automatically become brighter or darker in changing light conditions, eliminating the need to switch between different pairs of glasses. The frameless design offers you a clearer peripheral vision, preventing the frame from blocking your view. Ultralight cycling sunglasses reduce the pressure on your nose and temples, and you'll almost forget you're wearing them. The thickened PC lenses come with a UV400 protective coating. They are shatter - resistant and scratch - resistant, protecting your eyes from dirt, UV rays, and other harmful light. The adjustable soft rubber nose pad can easily find the right angle for you, ensuring that the sunglasses don't slip off your face and enhancing your user experience. ROCKBROS photochromic protective sunglasses can be used for various activities such as golfing, cycling, driving, fishing, skiing, running, tennis, racing, and other outdoor sports. TAC Lenses 100% UV400 protective coating, high - quality photochromic scratch - resistant TAC lenses that effectively block UVA, UVB, UVC, and other harmful light. Make your eyes more comfortable and help you see more clearly. Photochromic Lenses Intelligent sunglasses with a lens cycling system automatically adjust to become brighter or darker in changing light conditions, without the need to change lenses. ROCKBROS photochromic sunglasses provide excellent eye protection.