Have been using filters in my mask for 4 months
My original order took 3 months to arrive, ordered them right at the beginning of Covid19.  Now they come much faster.  Love having the filter in my mask, gives me more confidence to go out.  They do fog my glasses, however, if you lower your glasses above the top of your mask, you will avoid the fogging, most the time.  Just have to fiddle around until you find the right level and be able to use the glasses at the same time.  Highly recommend the filters.
Rating: 5 stars