The mask impresses with its 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 head strap, it offers a secure fit. The integrated filter elements ensure low breathing resistance and unrestricted visibility. The dolomite dust test guarantees a long service life for the particle filter. Additionally, a particle pre-filter can be used, further extending the service life. The mask's parabolic exhalation valve 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, as well as particles up to 30 times the permissible limit. Approved according to standard EN 405:2001+A1:2009.