Ratcheting Quick Release interchangeable temples and strap. Vented foam carriage. Scratch resistant polycarbonate lens provides 99% UVA/B/C protection. H2X anti-fog lenses. Dual pane lens provides the ultimate anti-fog performance. Outer polycarbonate lens protects against the environment, while inner acetate lens is designed to prevent fogging. Outside lens is coated with H2X Anti-fog Technology.