Replace the lens on your Marshall Goggles with the Spy Marshall Goggle Replacement Lens. Its ARC (Accurate Radius Curvature) dual-lens system brings the same optically correct, distortion-free viewing you're used to at the terrain park. The anti-fog coating has Spy's super secret formula that adds more protection than average anti-fog coatings, and the anti-scratch coating helps protect the lens from the world's more pointy objects.