The Root Cause Analysis is a high density acetate frame, which means its created from the good, expensive stuff. The time tested aviator shape originates back to a date of which the Internets is just not letting up that easilybut trust us when we say, timeless. Sidebar: Given the amount of hater comments regarding the words engraved across the tops of some of our frames, weve gone underground. We now communicate in Morse Code. For those of you picking up what were putting downthe messages will continue to flow. Maintain radio contact. I read you Houstonand come in Tokyo.