Photochromic Cycling Sunglasses UV400 Lightweight Rimless Bike Glasses

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