ROCKBROS Photochromic Cycling Sunglasses with Adaptive Lens

CONVENIENCE: Intelligence lenses changing from light to dark based on the UV intensity. Lighter the outside,darker the lenses. Do not need to interchange lenses for different light conditions LIGHTWEIGHT: This photochromic sunglasses only weight 29 grams.

Wide use for outdoor activities such as cycling, running, hiking,climbing,skiing,fishing,driving.,CONVENIENCE: Intelligence lenses changing from light to dark based on the UV intensity. Lighter th