Filter Insertion Steps

 
Step 1

With a new filter in hand, align the tab and then insert tab into one end of the mask
Step 2

Slightly fold filter to pass through the opening
Step 3

Reach fingers in the opposite end of the mask through the filter slit opening and grasp tab.
Step 4

With tab grasped, pull through filter until tab emerges on opposite end.  
Step 5

Insert fingers in opening of mask and smooth out filter to fill the cavity of the mask
Step 6

Reposition the tabs and wear!