The XXL edition offers an Extra Large 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 Features DESIGN - Frame suitable for extra large faces. Same lens proportions as the original Flak 2.0, available in a larger size. FRAME MATERIAL: Durability and all-day comfort of lightweight O Matter™ frame material. NO-SLIP GRIP: Unobtainium nosepads and earsocks become tackier when wet to help provide retention. Clear to Black Iridium Photochromic. Light Transmission: 23%. Light Transmission (Activated):14%. Light Conditions: Changing Conditions. Base Lens Colour: Clear.