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® 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® -Prizm™ lenses enhance color, contrast and detail for an optimized experience -Protective soft vault included