Fatboy Plastic frame Plastic lens Non-Polarized 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. Photochromic lenses.