INTRODUCING THE SEAL! The SEAL by Aqua Sphere is a revolutionary mask that merges two technologies. It combines the basic features of a diving mask (comfort and excellent visibility) with the qualities of a swim goggle (low volume and minimum drag). Using the technology of a scuba diving mask, the SEAL integrates a hypo-allergenic silicone skirt and an easy strap adjustment that allows the mask to seal perfectly to the face.Totally leak-free and incredibly comfortable, the SEAL mask can be used in total confidence by individuals who wear contact lenses, or by those whose skin around the eyes is very sensitive. For example, the SEAL mask is perfect for women who take special care of their eyes or have a concern about unsightly "goggle marks" caused by traditional swim goggles.The SEAL mask fits a wide range of faces, from children to seniors. The curved lens is made of Plexisol?????, a patented material that is 10 times lighter and 20 times more resilient than regular glass. This material also features superior transparency, combined with anti-scratch and anti-fog treatments. Additionally, the lens is UV protected for outdoors activities and is available in clear or smoke (tinted). The SEAL's wrap-around curved lens allows nearly 180 degree panoramic vision underwater, without any view distortion. Because it is an extremely low-volume mask, the SEAL has virtually no drag in the water.