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!