RockBros Cycling Sunglasses, Intelligent Lens, Photochromic, Clear Transparent, Ultralight, Rimless, UV400 Protection, Great for Golf, Cycling, Driving, Skiing, Runing, Tennis, Racing and Other Outdoor Sports <br> Transmittance: 80%-18% (80% is light gray color when in low UV, 18% is dark gray color when in high UV) <br> <b>Warning:</b> <br> Color changing time differs from intensity of sunlight.Winter for about 3 minutes , summer for about 2 minutes <br> Brand: RockBros <br> Weight: 24g/pair <br> Gender: Men,Women,Adult,Youth <br> Color: Black Red , White Red <br> Delicate lenses : Lenses with UV400 protection + Intelligence photochromic technology <br> <br> <b>Product Dimensions:</b> <br> Lens hight:5cm <br> Nose bridge: 2.5cm <br> Frame length:14.3cm <br> <br> <b>Package Included:</b> 1* Intelligence photochromic lenses glasses <br> 1* Portable pouch + 1* Glasses box <br> 1* Glasses cloth <br> <br> <b>Features:</b> 1.PHOTOCHROMIC TECHNOLOGY: Intelligent lens cycling sunglasses automatically lightens or darkens in response to changing light conditions without needing to switch between glasses <br> 2.Frameless construction giving you more clear peripheral vision to avoid the frame blocking your view <br> 3.Ultralight cycling sunglasses reduce more pressure on your nose and temples and the tendency to forget you're wearing it <br> 4.Thicken PC lenses with UV400 protection coating, shatterproof and scratch-resistant effectively, protecting your eyes from any debris, UV rays and other harmful light <br> 5.Adjustable soft rubber nose bridge can easy find the right angle for you and ensure the sunglasses doesn't slide off your face to upgrade your using experience <br> 6.ROCKBROS photochromic goggles can be used for multiple activities, such as golf, cycling, dirving, fishing, skiing, runing, tennis, racing and other outdoor sports <br>