Men & Women cycling sports glasses. 

DETAILS

• 1. Hydrophilic Rubber
• 2. Acetate Frame
• 3. Polycarbonate Lens
• Unpolarized
•  100% UV Protection
• 6. Adjustable non-slip nose and Ear pads case included
• Lens Width: About 8cm
• Lens Height: About 5cm
• Lenses Material: Polycarbonate
• Frame Material: Acetate

Note: Normally, the stronger the uv rays, the darker the lens

1. Color change time: winter-1 minute, summer-40 seconds.
2. Speed depends on sunlight and UV intensity!
3. The rate of discoloration is related to the intensity of ultraviolet light and the temperature.
(if UV intensity and temperature is low, The speed of discoloration will become slower).