The mask impresses with top-notch quality, durability, and reliability during long wear times. It is easy to handle, as it is a full mask that can be used immediately. Thanks to its comfortable straps with head support, it offers a secure fit. The integrated filter elements ensure low breathing resistance and unrestricted visibility. The dolomite dust test (D) guarantees a long service life for the particle filter. Additionally, a particle pre-filter can be used, further extending the service life. The parabolic exhalation valve of the mask reduces heat buildup. The 3M half mask 4277 has a protection level of FFABE1P3 R D. It protects against organic gases and vapors, inorganic and acidic gases such as SO2 and HCl, as well as particles up to 30 times the limit value. Approved according to standard EN 405:2001+A1:2009.