Our 3S Positive Pressure Full-Face Mask is highly popular and available in more than 50 variations. All versions are designed to fit comfortably, with a wide sealing frame and deep chin stop. The lens provides excellent viewing and is either impact-resistant polycarbonate; silicate-coated glass or Triplex glass. The inner mask is fog-free and supplies optimal air flow. The harness is designed for pressure-free easy use and works seamlessly with a protective helmet.