Product Description:
Sunglasses photochromic cycle UV400 outdoor sports men's and women's glasses
Note: Only unique glasses, no box, no box, no box
When tinned lenses are irradiated by ultraviolet visible light and short-wave in sunlight, the color becomes darker and the light transmittance decreases; Inside or in dark places, the light transmittance of the lens increases and the color disappears. The photochromic properties of lenses are automatic and reversible. Photochromic glasses can adjust the light transmittance by changing the color of the lens