Oakley engineering takes performance to the next level and brings style along for the ride. Flak 2.0 offers a standard size frame with enhanced lens coverage, and every millimeter of the lens is optimized with High Definition Optics in a ruggedly durable yet lightweight design. Designed to push your limits with patented XYZ Optics for razor sharp clarity and secure grip of UnobtaniumFeatures:- Oakley HDPolarized lenses filter out 99% of reflected glare without the haze and optical distortion that can come with traditional polarized lenses.- The XL edition offers enhanced lens coverage and specialized lens curvature for protection against sun, wind and impact- Unobtanium earsocks and nosepads keep glasses in place, increasing grip despite perspiration- Patented High Definition Optics (HDO) provides superior optical clarity and razor-sharp vision at every angle- O-Matter stress-resistant frame material is both lightweight and durable for all-day comfort and protection- Light Transmission 16%- Light Conditions Bright Light- Contrast Increased- Fit standardSpecifications:Frame Fit Standard Fit:- 1 Lens Width 59 mm- 2 Bridge Width 12 mm- 3 Lens Height 38 mm- 4 Temple Arm Length 133 mm