Bolle Product #: 20795 * All Bolle goggles are engineered with the latest helmet designs in mind so the fit is smooth. * All Bolle lenses block harmful UVA/UVB rays up to 400 nanometers. * Designed to reduce fogging and optimize the flow of air over the inside of the lens. These venting ports control airflow, while preventing clogging from snow and ice. * The Bolle unique double lens design creates a thermal barrier, while providing exceptional optics and a superior seal.