Flak® 2.0 XL - Polished Black Frame - Prizm Sapphire Polarized Lenses - 009188-F759The XL edition offers a standard size frame with enhanced lens coverage, and every millimeter of the peripheral view is optimized with High Definition Optics in a durable yet lightweight design that takes performance to the next level and brings style along for the ride. Lightweight O Matter frame material with ellipse metal icon accents Unobtainium earsocks and nosepads for increased comfort and performance 8. 75 base lens geometry with HDO Impact