ROCK BROS Photochromic Sunglasses Intelligent Lens, Photochromic Clear Transparent Ultralight Rimless UV400 Protection Great for Golf, Cycling, Driving, Skiing, Runing, Tennis, Racing and Other Outdoor Sports

Transmittance: 80%-18% (80% is light gray color when in low UV, 18% is dark gray color when in high UV)

Product Features:

1.Photochromic Technology

2.Frameless Construction,Wide Vision

3.Lightweight cycling sunglasses

4.Thicken PC lenses with UV400 protection coating

5.Adjustable soft rubber nose

6.ROCK BROS sunglasses can be used for multiple activities

Warning:Color changing time differs from intensity of sunlight.Winter for about 3 minutes , summer for about 2 minutes