Rec Specs Liberty Sport designs the Switch B7 sunglasses for the athlete who appreciates edgy style and exceptional performance. These 8 base sport-wrap shades offer a fantastic field of vision, and impressive clarity. The high-wrap design blocks out all the undesirables: wind, dust and debris, and 100% of UVA and UVB sun rays. The interchangeable lens system allows you to swap lenses quickly, reacting nimbly to changing conditions to maximize your performance.