PRODUCT OVERVIEW:Oakley Prizm™ is a revolutionary lens technology that dramatically enhances contrast and visibility over a wide range of light conditions. Prizm™ lenses have been engineered to help you perform over a wider range of lighting conditions, reducing the need to switch lenses as lighting conditions change. Learn more about Oakley Prizm Snow . Important Note: Use care when installing/removing accessory lenses. Scratched lenses cannot be returned and are not covered under Oakley's warranty policy.