The Rydon frame has been Rudy Project's No. 1 selling frame due to its perfect balance, adjustability, fit and field of vision. The Rydon encompasses all of Rudy project's hallmark features: fully adjustable Ergo IV nose piece and 360-degree fully adjustable temple pieces for a perfect custom fit and fog-free optics. The Rydon has proven itself as being extremely utilitarian in design and perfect in tactical scenarios. As such, it seems only proper to pair our best frame design with the world's best lens technology — ImpactX. ImpactX is a family of polyurethane optical polymers, transparent and unbreakable, originally developed for the military to provide superior protection and performance. In fact, the military utilizes this material in developing windshields for Apache combat helicopters. Like their airborne counterpart, ImpactX lenses are virtually indestructible and can be contorted and flexed without breaking or distorting. As such, ImpactX does not produce the invisible stress fractures of the polycarbonate lenses found in most eyewear, resulting in the absolute best optics with little-to-no distortion and unparalleled vision protection. The ImpactX Photochromic Clear lenses are ideal in their light management and range from 78-percent light transmission (virtually clear) to 17-percent light transmission in the matter of seconds dependent upon light exposure. The Rydon complimented with the over-the-top optical advancements of ImpactX lenses provides the ultimate in tactical eyewear.