Bolle Volt Goggle (Blue/Vermillon) Bolle Product #: 20707 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.