3M Full Face Mask 6800S KL1 Z Filter 3M 6000 Series, EN 136. This versatile system is suitable for a variety of situations and protects against dust particles as well as a range of gases and vapors. The integrated sealing ring between the face shield and the filter connects the filter directly to the polycarbonate lens of the mask. The scratch- and impact-resistant, hypoallergenic elastomer face design with two filters ensures lower breathing resistance.