The innovative anti-fog technology of arena swipe anti fog technology has 10 times longer duration and can be renewed simply by wiping the lenses with your finger. Gently wipe the inner lenses with the edge of your fingers while the goggles are in the water, making sure that the lenses are not dirty while performing this procedure. Every time you do this while your lenses are fogged, excellent visibility with long duration is ensured. The curved shape of the lenses provides greater peripheral and not only visibility.