Dustproof Masks - Activated Carbon Dust Mask with Extra Filter Cotton Sheet and Valves for Exhaust Gas, Pollen Allergy, PM2.5, Running, Cycling, Outdoor Activities (Mask Filter 4 PCS, Dust Masks)

1.With nosepiece facing away from you.Holdthe earloop in each hand with the nosepiece up.
2.Position the respirator under the chin.
3. Pull each strap over the ear. Adjustthestraps as comfortable as possible.
4.Place the fingertips of both hands atthetops of the nosepiece. Mold the nosepiece to the shape of the nose bridgebypushing inwards while moving your finger tips down both sides of thenosepiece.Pinching the respirator using only one hand may result in lesseffectiverespirator fit.

✔If it very important to press the nosepiece firmly to the nose bridge to from a good seal.

Replacement ：

1.Open the mask,revealing the internalvalve filter.
2.Follow the open instructions on thevalve , counter clockwise rotationof the valve, separation the air valve.
3.Take down two valves,remove the filter.
4.Change a new filter,fllow the closeinstructions on the valve,clockwise rotating the valve and replacement iscompleted.

✔On the valve, it is essential thatyoulocate the two pins, nearest the hinge, properly into the body of thevalve,and check that they are seated properly.

PACKAGE INCLUDING:

1 Pack:
1xNovemkada Dustproof Mask
2x Extra two valves
1x Filter cotton

Other please check the picture.