TUSA Freedom Quad MaskThe M-41 Freedom Quad is a low profile 4-window mask.It features the revolutionary Freedom Technology delivering superior fit, comfort and performance. The Freedom Quad fitline, lens and frame shape are derived from the popular M-211 Freedom One. The M-41 comes standard with CrystalView Optical Glass lenses and is the first TUSA panoramic view model equipped with Freedom Technology. In addition to Freedom Technology, the M-41 features TUSA's patented Quick-Adjust Buckle System, 3-D Anatomical Strap, Round-Edge skirt technologies and is available in a black silicone.FEATURESLow profile 4-window teardrop designEquipped with Freedom TechnologyCrystalView Optical Glass lensesEnhanced field-of-view over 2-window masksSkirt mounted Quick-Adjust Buckle SystemRound-edge skirt for maximum fit and comfort3-D strap for ideal anatomical fit