Intelligence Photochromic Lens ：
The lenses will change color due to the intensity of the UV light. suffering the stronger sunlight, the glasses lenses will be black;
In cloudy day, it changes into gray;
At room or night, it's transparent.
The advantage of a photochromic lens is that you can wear your eyewear all day and can change your lenses color according to light conditions.

LIGHTWEIGHT：
This photochromic sunglasses only weight 26 grams.
PC made lenses and frame process durable photochromic cycling glasses.
And nose pads make you comfortable while wearing.
One of the most annoying things about the sunglasses is that they can get too heavy.
These glasses are constructed using special design techniques, ensuring you stay comfortable and safe at outdoor activities.

Protect Your Eyes ：
Polarized sunglasses reduce glare reflected off of roads, bodies of water, snow, and other horizontal surfaces.
Restore true color, eliminate reflected light and scattered light and protect eyes perfectly.
Polarized sunglasses cut glare and haze so your eyes are more comfortable and you can see better.

Applies to ：
Wide use for outdoor activities such as cycling, running, hiking ,climbing ,skiing ,fishing ,driving.
Hd Polarized lenses :
UV400 protective lenses block
harmful UVA, UVB, and UVC rays.
The best men's UV protection polarized sunglasses!

[color-changing lenses]
Darkened by exposure to the moderate intensity of the sun's ultraviolet rays, but not artificial light, so lenses are dark in bright sunlight but clear in low-light environments.

Lightweight, rugged, ultra-light, high-quality PC frames:
You can barely feel them, but they're unbreakable!

[! Important note!]
Note: You need to test for discoloration in sunlight, but not in artificial light.

Multifunctional sports sunglasses:
Suitable for outdoor activities such as driving, running, fishing, racing, skiing, mountaineering, hunting, hiking, biking, motorcycle, etc.