Cycling Bike Polarized Sports Sunglasses Goggle UV400 5 Lens, TR-90 Frame Gorgeous outdoor sunglasses for biking, driving, fishing and other outdoor activities The material for this style sunglasses were TR-90 (plastic titanium), a Swiss technology, this thermoplastic is the material used in this sunglasses. Its extreme flexibility, durability and light weight make it the perfect material for performance eye-wear. The lenses can defend your eyes from wind and dust perfectly, Lens are made of high quality shatterproof PC material that is durable enough for long time using. It has anti scratch function so you can wear it to play sports One pair of the lens are polarized