Three (3) distinct layers combined to produce one superior frame structure. | Freedom Technology is a set of technologies to enhance fit and performance exclusive to TUSA. | Ultraviolet (UV) light is dangerous. Although the dangers of UV are recognized, there is another type of dangerous light; High-Energy Visible (HEV) light. | TUSA's Anti-Reflective (A/R) Lens Treatment decreases internal and external reflected light. CrystalView Optical Glass lenses provide superior clarity, color, and transmission of light over standard glass lenses used by the competition. | The Skirt Mounted Five (5) Angle Strap Adjustor allows for a five position micro-adjustment on both the left and right sides of the mask.