.PHOTOCHROMIC LENS: The color of the lens changes with the intensity of ultraviolet rays, UV400 lens effectively resist harmful ultraviolet rays to protect eyes. Generally, the stronger the ultraviolet rays, the darker the lens color. FASHION FRAME: Stylish glasses make you cool in the crowd, the curved frame design could fits the face better and fits most face shapes. Suitable for cycling, driving, running, fishing, racing and climbing,trekking or other outdoor activities. SOFT & COMFORTABLE: This sunglasses designed with adjustable nose pad to fit your nose better. Soft rubber temple make your feel comfortable while cycling. The glasses frame is also equipped with two air holes to prevent the glasses from fogging. LIGHTWEIGHT: Only weight 25g, reduce the pressure on the face, make you wear without pressure and ride easier.