Diving goggles feature patented, exclusive Liquidskin technology. Bi-silicone technology uses two different types of silicone: a firmer portion for support structure and a softer portion for contact with your face. It is 45% softer for unparalleled comfort and 270% more elastic for a perfect fit. The advantage of glasses is optical lenses that are easy to install. Small horizontal ribs in the area around the nose absorb and redistribute the pressure exerted by the frame, resulting in increased comfort.