Full Face Mask SFERA/Silicone (Class 3)

facepiece made of silicone, which is particularly kind to the skin patented anti-fogging, non-reflecting, distortion-free and anti-scratch polycarbonate visor shield with very large field of vision with standard thread connection DIN EN 148-1 built-in speech diaphragm the outstanding transmission of the voice allows the use of megaphones, telephones and two-way radios universal size allows the mask to fit tightly but without pressure irrespective of the shape of the face 1 large exhalation valve with exhalation valve pre-chamber results in low exhalation resistance and prevents dangerous media from penetrating the inside of the mask the inner mask is equipped with 2 check valves which reduce clearance volume and prevent the visor shield from misting up through even visor ventilation approved for firefighters more