ROCKBROS Photochromic Cycling Sunglasses Frameless - SP318 Bicycle Shoe Covers It uses different materials on

It uses different materials on the front and back

Short press to switch modes

forefinger and middle finger

hypoallergenic

Sensitive Sensor System:

ROCKBROS Photochromic Cycling Sunglasses Frameless - SP318 Bicycle Shoe Covers It uses different materials onPHOTOCHROMIC TECHNOLOGYGet ready to rock your ride with ROCKBROS photochromic sunglasses! Our magic lenses transition from clear to cool dark gray, adapting to the level of ultraviolet light. Whether youre cycling under the blazing sun or cruising through shady streets, these shades automatically adjust to give your eyes the perfect level of protection. (Yep, they change color like a chameleon when exposed to direct sunlight!) CRYSTAL CLEAR LENSES