馃暥 PHOTOCHROMIC TECHNOLOGY: Photochromic lenses darken and lighten as the outdoor light changes without needing to switch between glasses , the color of photochromic sunglasses will change from clear to grey in sunny , Effectively protect your eyes and maintain a comfortable light. Comfort and performance that holds lenses in precise optical alignment.
馃暥 UV400 PROTECTIVE LENSES : The PC lens of sports sunglasses is Anti-UV, with UV400 protection coating, Since the light with wavelength below 400 nanometer are the ultra violet light range which is harmful for the eyes, this sunglasses will provide people the 100% UV protection to protect your eyes perfectly.