Photochromic sunglasses for outdoor activities, unisex, ROCKBROS Color:Black if you prefer a looser

if you prefer a looser fit

Charging Time: 5H

24-SPEED SYSTEM

It is very easy to assemble and remove and can be quickly attached without additional tools

and steel cables

Photochromic sunglasses for outdoor activities, unisex, ROCKBROS Color:Black if you prefer a looserPhotochromic Technology: Photochromic lenses are based on the intensity of sunlight. The lenses darken in sunlight and briefly lighten indoors. You don't need to change lenses in different light conditions. Lightweight and Comfortable: The photochromic sunglasses weigh only 30 grams, and you won't feel a thing on your nose. These ultra lightweight cycling sunglasses reduce pressure on your nose and temples. Safety: The thickened PC lenses with UV400