Chinese FMJ05 Gas Mask Review and Test
Apr 22, 2026
Review and test of the Chinese FMJ05 Gas Mask/Respirator also known as the Type MF11 (B) gas mask.
This is a very simple mask with a 40mm filter intake on the left side, a combined exhale valve and voice diaphragm at the front of the mask and a simple oral-nasal cup.
Overall I'm very impressed with the quality of it, simple and effective. Chinese filters may contain asbestos so I opted not to test the filter it comes with.