The 3M™ Half Mask 4255 is a ready-to-use, maintenance-free half mask that provides effective and comfortable protection from many of the common gases, vapors and particles found in industrial environments. It convinces with first-class quality, durability and reliability with long wearing times. It is easy to handle because it can be used immediately as a complete mask. Thanks to its comfortable straps with head support, it offers a secure fit. The integrated filter elements ensure low breathing resistance and unrestricted vision. The dolomite dust test (D) guarantees a long service life of the particle filter. In addition, a particle pre-filter can be used, which further increases the service life. The parabolic exhalation valve of the mask reduces heat accumulation. The 3M™ half mask 4255 has the protection level FFA2P3 R D. The application limit is 30 times the limit value for organic gases and vapours as well as for particles. Approval according to standard EN 405:2001+A1:2009.