MF1A mask has four standard sizes, respectively 4 (large), 3,2,1 (small) number marked on the left side of the body below the hood, these four dimensions to adapt to adult citizens face
Technical specifications:
Protective objects: According to the need to select a different canisters, protection can be a variety of toxic gases were steam and toxic smoke smog (see list of canister performance)
Fuel-air transmission: not more than 0.005%
Inspiratory resistance: not more than 20daPa
Leakage factor: not more than 0.0001%
Total field of vision: 75%
Binocular vision: 35%
Third, the use and storage precautions
Matching and wearing masks:
Users according to their own type to select the mask first, the airway and a mask with canisters are connected to tighten, unplug the canister when using the bottom plug, the masks worn on the head, hands blocking the filter poison tank bottom, inhale several times to check the mask for leaks
Wear in the contaminated area, then closed his eyes first, to suspend breathing, rapid wear masks, opened his eyes after a deep breath
