The Smith Electra goggle is built to be soft on your wallet and next to your face. A value with a lot to offer at the same time. Comfortable face foam for a snug fit, Medium in size to adjust to any face and helmet compatible for a seamless fit with any helmet company. Dual lenses, foam venting top & bottom and a anti fog treatment so you can stay out all day in any conditions. Medium Fit Compression molded face foam Fog-X anti-fog lens coating Smith Flex thermal lens. Perforated Membrane Technology (PMT) provides active ventilation Reliable performance in a helmet compatible model