2.4mm thickness ToughZone lens coating 100% UVA/UVB protection Scratch-resistant lens The Crosshair&';s DedBolt Lens Locksystem allows for rapid lens interchange. The ToughZone lens coating protects both sides of the lens with a scratch-resistant treatment. ESS optics provide distortion-free optical clarity throughout the entire field of view. All Crosshair replacement lenses include a black nosepiece.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }