ESS Sunglasses CDI Series.Authorized dealer-warranty is valid.Redesigned and Better Than EverThe resilient, battle-hardened CDITM sunglass has a long track record of saving eyes and lives in hostile situations. Following a series of comprehensive overhauls, the redesigned CDITM has never been better.The ESS CDI's U.S. MIL SPEC* high-impact lenses can be easily exchanged for quick adaptation to your environment. Its high-speed low-drag frame and shatter-resistant lenses make the CDITM comfortable and cool enough for downtime yet functional and rugged enough for the battlefield. Medium fit.The CDI's Lateral Exchange SystemTM makes interchanging any of the seven available lens colors quick and easy:CDI Kit IncludesA Desert Tan CDI frame, two sets of 2.2mm high-impact lenses (Clear and Smoke Gray), an elastic retention strap, a micro-fiber pouch/cleaning cloth, and a zippered hard case.