Oakley O-Frame Dual Vented MX Goggle Lens The Oakley Dual Vented lens includes anti-fog treatment on the inner surface. That's just the start of its fog-cutting performance. Fog buildup occurs when moisture vapor from your skin comes into contact with a lens cooled by air temperature and wind. This design uses two lenses and puts an insulating layer of air between them. It gives you the ultimate in fog protection, along with unsurpassed clarity and impact resistance. **Note: Currently Oakley products can only be shipped to U.S. customers
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