Oakley’s Ridge Line offers a rugged cylindrical lens for an expanded field of vision in a variety of winter weather conditions. The anti-fog lenses in combination with a particularly comfortable three-layer foam provide moisture transport reliable, all-day wearing comfort. Fire Iridium Lens Oakley High Definition Optics (HDO®) provides true, precise vision with optically correct geometry and clarity. The Fire Iridium Lens is suitable for bright light, sunny and cloudy conditions. Transmittance of visible light: 12 % FeaturesPerfect vision without distortion with Oakley High Definition Optics (HDO®)Low-profile design: Cylindrical lens for better visibility and improved helmet compatibilityAdjustable 35mm strap with silicone insert for a secure fit Extremely high impact protection and guaranteed shatter protection thanks to the plutonite lens materialHelmet compatibleO-Matter frame: soft, flexible frame3-layer foam with quick drying fleece