Manufactured from a thin, soft silicone material that gives a soft, flexible seal that doesn't push uncomfortably against the face. The Cool Flow valve facilitates exhalation and reduces the build-up of carbon dioxide, heat and moisture inside the mask. The mask is used together with 3M´s repacebal filter that protects against gasses, vapour and/or particles. (6000-, 2000- and 5000-series filters). The masks have double filters, giving lower breathing resistance, better weight distribution and a wider field of vision.