Sliiq Alpha - Ski / Snow Goggles with Mirrored Anti-Fog Dual Vented Lenses and 100% UV Protection Dual vented airflow lenses with anti-fog coated inner lens keep your vision clear and free of fog. 100% UVA/UVB protection, mirrored S3 level outer lens allows 8-18% of visible light transmission (VLT). Flexible inner frame and high quality foam form a tight seal on your face, ensuring all day comfort. Scratch resistant polycarbonate lens and highly durable frame protect your goggles from wear and tear. Helmet compatible with adjustable silicone backed anti-slip strap.