This is my second purchase of this filter.
I cleaned my air ducts,a lot of dust was caught by the filter during the cleaning process. It looked like the filter caught all the dust.
It looked like nothing got by the old filter Lennox X6673 MERV 11. I put in a new Lennox X6673 filter after the duct cleaning.
It's a good filter,goes in and out of filter opening nicely. It's a sturdy made filter,not like some cheaper filters that tend to bind.
My wife noticed less dust in the house,happy wife,happier life.