Oakley Fuel Cell Polished Brown Smoke frame with Dark Bronze Lens. A smart functional everyday pair of sunnies. Unpretentious styling & Oakleys amazing technologies means you can have form & function. The lens of the Fuel cell is cut from one piece of optically pure Plutonite & then fused into the frame giving perfect optical clarity. Lens: Increased contrast 12% light transmission Category 3 Dual lens Polaric Ellipsoid geometry Optical precision & impact resistance meet or exceed Z87.1 optical & basic impact standards UV protection of Plutonite lens material that filters out 100% of UVA/ UVB/ UVC & harmful blue light up to 400nm Frame: Durability & all-day comfort of lightweight, stress resistant O Matter frame material Comfort & performance of Three-Point Fit that holds lenses in precise optical alignment Metal icon accents