The M-41 Freedom Quad is a Low Profile 4-Window Mask that features the revolutionary Freedom Technology delivering Superior Fit, Comfort and Performance. The Freedom Quad Fit-Line, Front Reversed Teardrop Lens and Frame Design Shape are derived from the popular Freedom One. The M-41 comes standard with CrystalView Optical Glass lenses and is the first TUSA Panoramic View Model equipped with Freedom Technology. Panoramic View Masks feature a Incredibly Wide Field-of-View. This Design incorporates Minimum Frame Volume, Reduced Frame Structures and Four Window Styles for Maximum Vision. The Quad Mask Front Lenses are Tempered CrystalView Optical Glass that provides Superior Clarity, Color and Transmission of Light over standard glass lenses used by the competition. Up to 15% of available light can be lost with a standard glass lens due to impurities and reflectivity. The TUSA CrystalView Lenses Transmit 92% of available light to the diver for Clear and Crisp Vision. Freedom Model Masks feature a Dimpled Skirt Surface with Varied Silicone Thicknesses and Stability Ridges in addition to a Proprietary Low-Friction Double Feathered Edge Skirt Surface on the Fitting Line. The Quick-Adjust Buckle System incorporates a newly-designed Low-Profile Buckle into the Crystal or Black Silicone Rubber Skirt of the Mask. The result is a Compact, Lightweight, Technologically Advanced Mask Design that can be Easily-and-Quickly Adjusted for a Perfect Fit. TUSA"s Round