The high-performance BLOC Boa goggle offers a compact frame shape with anti-fog lens technology. They are perfect for winter sports. Features: 100% UVA and UVB protected (UV400) Tri-layer moisture wicking insulated fleece ensures your face is snug, warm and comfortable Cut out recess in fleece allows optical frames to sit comfortably underneath the goggles Dual adjustment strap keeps the google strapped close to the face all day long Helmet compatible XT DAF anti-fog spherical dual lens - Stops cold mountain air condensing with warm air inside the goggle and provide additional impact protection Anti-fog coating stops water droplets clinging onto lenses and blocking vision Vents direct airflow over BLOC goggle lenses, stopping moisture from settling and causing fogging Outer lens constructed from maximum impact resistant polycarbonate Designed for medium to large faces Soft microfibre case for storage included Bloc goggles exceed European directive 89/686/EEC in accordance with the Norm EN174:2001 BLOC Lens Colour Technology: Light Purple Mirror Silver Lens: Category 2: 43 - 18% light transmission Silver mirrored on a light purple base A general purpose lens, good protection against sun glare