Efficacy: Fashionable and versatile color-changing sunglasses, effectively blocking ultraviolet rays.
Features: 1. Fashionable photochromic glasses, transparent indoors and gray outdoors, blocking ultraviolet rays, comfortable for the eyes. 2. The frame is made of recycled PET material, lightweight and environmentally friendly. 3. Lens specifications: visible light transmittance is 95% when exposed, and 22% when shaded; UV blocking rate is 99%. 4. Color: matte black frame & gray lenses.
Instructions: Please hang the temple on your ear and use it outdoors.
The color of the photochromic lens will change with the action of ultraviolet light.
When exposed to ultraviolet light, the lens will change color within a few seconds.
When shielded from ultraviolet light, the lens will fade within a few minutes.
The time required for color change is longer and the time required for fading is shorter in high temperature environments.
The time required for color change is shorter and the time required for fading is longer in low temperature environments.
The color change and fading time are different in summer and winter seasons.