The Visio Tri-ex Mask from Tusa is an ultra-wide panoramic view three-lens mask designed to increase the field of view and improve safety. Conventional three-lens masks have blind spots, but we have reduced the size of these blind spots through the use of domed side windows, creating a wide-angle panoramic view. The front and side windows provide an ultra wide viewing of 168°. This mask also features round edge skirt for superior seal and increased comfort and three-dimensional strap that snugly fits against the head's curvature for unprecedented fit. An ultra-wide panoramic-view three-lens masks designed to increase the field of view and improve safety by ensuring you don't lose sight of your diving buddy.