Dear Friend,Thanks for visiting my shop,I hope you have a great journey in my shop.Please feel free to contact us if you have any questions. Photochromic lenses change from light transparent to black under the irradiation of ultraviolet rays (sunlight). photochromic bicycle glasses/sunglasses Features: adjustable nose pad, silicone nose support, Soft and elastic to the touch，more comfortable to wear Function: photochromic, UV resistant, windproof Gender: Suitable for both men and women Lens width: 145mm Camera height: 55MM Weight of glasses:27g Frame material: TR90 Optical properties of lenses: photochromic/UV400 Set configuration: 1 * TR90 frame 1 * photochromic lens 1 * Myopia glasses frame 1 * Glasses case 1 * Glasses bag 1 * Glasses cloth 1 * Sports headband