Fast and Furious, the Fat Boy sunglasses feature photochromic lens technology. The lens transmission allows 85% of light through indoors and 32% of light through while outdoors in bright light. Featuring anti-fog, polycarbonate lenses, this eyewear enables usage through varying light. In addition, closed cell foam around the frame improves comfort and prevents wind or debris from impairing clarity. These sunglasses are RX ready.