The KLR PURE Lens System is composed of virgin optical-grade GE polycarbonate. Inherently UVA UVB and IR shielded, every KLR lens shields your eyes from dangerous sunlight in every playing condition. The interior thermal lens is applied with 3M Foam Sealant, trapping a layer of cool barrier insulating air, eliminating condensation and encouraging evaporative cooling. Maintain incredible visual clarity without the worry of fog with the KLR Pure Lens System!