Product Features: Photochromic technology: Intelligent lens cycling sunglasses automatically lightens or darkens in response to changing light conditions without needing to switch between glasses. Frameless construction giving you more clear peripheral vision to avoid the frame blocking your view Lightweight: Only 24g/pair, great to wear for long periods of time. Ultralight cycling sunglasses reduce the pressure on your nose and temples Safety: Thicken PC lenses with UV400 protection coating, shatterproof and scratch-resistant effectively, protecting your eyes from any debris, UV rays and other harmful light Comfortable: Adjustable soft rubber nose bridge can easily find the right angle for you and ensure the sunglasses doesn't slide off your face when playing golf Multi-purpose: photochromic goggles can be used for multiple activities, such as golf, cycling, driving, fishing, skiing, runing, tennis, racing and other outdoor sports