Engineered to rigid military specifications, with classic aviator styling, the performance-tested Original Pilot sunglass has been a favorite of military pilots for more than 40 years. It's been issued to millions of U.S. soldiers, sailors, Marines, and Air Force pilots since 1958. The rugged and sturdy structure and high-quality finish of the steel-alloy frame, coupled with distortion-free, toughened and polished, true-glass lenses, have made the AO Original Pilot a true standout among fine aviator sunglasses.^--jtyl Keep your view smudge-free with Lens Cleaner.