?Photochromic Cycling Glasses?The lens automatically changes from clear to dark gray in response to the intensity of the ultraviolet, effectively maintain a suitable brightness to protect your eyes in strong sunshine. | ?UV400 Protection?These bicycle sports glasses are made of high-grade lenses and ultra-light memory TR90 frames. Coating mirror lenses have UV400 protection, can block harmful UVA & UVB rays, safe, durable, and impact-resistant, protect your eyes from sand, heavy wind, and strong sunlight. | ?Comfortable Feeling? These photochromic bike sunglasses with flexible temples and soft rubber nose clips, suitable for different face shapes. Built-in myopia frame design, convenient for you to install glasses. | ?High-Speed Cycling?Full frame design that brings a better effect of windproof, dust-proof. Moreover, the curve design lens of these mountain bike glasses has low air resistance which is suitable for high-speed cycling. | ?Multifunctional Occasions?Photochromic sports glasses perfect for cycling, mtb,riding a motorcycle, driving, skiing, baseball, softball, basketball, mountain climbing, fishing, playing golf, hiking, tennis, boating, and other activities.