Semi-protective mask against organic gases and vapors, dust, metal fumes, mists, microorganisms eg bacteria and viruses. Multi-purpose protection for substances in concentrations up to 1,000 ppm and from dust and mists up to 50 TLV. Compact, light and flexible design that allows it to adapt perfectly to the face and have a wide view, without interfering with the eye and ear protection devices. Large central non-return valve, allows to minimize the user's breathing resistance and the formation of moisture inside the mask.