Bolle Carve Snow Goggles 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. Embedded premium anti-fog layer in the inner lens disperses water molecules across the surface of the lens, restricting moisture build up that can impede your crystal clear view of the terrain ahead Double layer face foam, a medium density foam backed up a soft micro-fleece face layer. Outer lenses are sheathed in a protective armour to prevent scratches, keeping your lenses and outlook as clear as a bluebird sky. All Bolle goggles are engineered with the latest helmet designs in mind so the fit is smooth.