Photochromic Cycling Glasses:These Cycling Glasses take photochromic technology, the lens will automatically brighten or darken in response to ultraviolet intensity, change from light to dark sunny, effectively maintain suitable brightness for protect your eyes.The darkness of lenses color depends on UV intensity UV400 Protection:Using HD polycarbonate mirror coating lenses have excellent optical quality, can restore true colors , and reduce reflections. UV400 protection coating, blocking harmful UVA and UVB rays, which can eliminate glare and reduce eye fatigue, making the scenery clearer and softer. Protect your eyes from sand, wind and sun resistance. TR90 Frames:Due to the lightweight and strong stress-resistant TR90 frame, the weight of the whole Cycling Glasses is only 36g. Comfortable rubber material:These cycling sunglasses with hydrophilic rubber nose pads, The hydrophilic rubber stays grippy even when wet, so the glasses stick to your nose when you move, regardless from sweating to rain or fog, There is no need to worry about sunglasses falling off during strenuous exercise.