The XL edition offers a standard size frame with enhanced lens coverage, and every millimeter of the peripheral view is optimized with High Definition Optics(TM) in a durable yet lightweight design that takes performance to the next level and brings style along for the ride.a Lightweight O Matter(TM) frame material with ellipse metal icon accentsa Unobtainium(TM) earsocks and nosepads for increased comfort and performancea 8.75 base lens geometry with HDO(TM)a Available with Prizm(TM) lenses to enhance color, contrast and detail for an optimized experiencea Polarized and Iridium(TM) lens options availablea Available with Oakley Authentic Prescription Lensesa Protective soft vault included