UV Protection: Ultra lightweight and highly scratch resistant material lens with UV400 technology offers maximum protection from harmful light UV Rays. Feature: Polarizing layer lenses can effectively filter out excess light, weaken the strong light, make the dazzling light softer, play a good anti dazzling effect, make the field of vision more concentrated and keep the eyes always comfortable. Easy to UseDurable and flexible spring-loaded clips will not easy to break, pop/flip design made the lens can be flipped. Build to Last: Constructed by precision engineered spring bridge ,ensures smooth, solid and durable flip up that won't break or stick. Suitable Occasion: Suitable for sports or daily life on all season. Ideal for vacation, reading on the beach and other outdoor activities like summer fishing, sailing, winter skiing, motorcycle, cycling bicycle, running, racing and climbing, trekking etc.