The Sinister MX6 FUZION Goggle chassis with a two part frame, rigid lens seal, quick lens change, and outriggers provide a great starting point to design the best MX goggle out there. Optimized foam density for dirt riders keep the dust out. FUZION technology bonds an anti-fog lens material inside the PC lens, providing premium anti-fog technology. Premium anti-fog capability is 5x better and longer lasting than traditional PC lens technology. The single pane 1.4mm PC lens is thicker and more impact resistant than a conventional PC lens.