
A good mesh protects against flies, fine dust and odors. I live in the private sector... I put it on two windows in the spring before the pollen and dust season. I've washed it a couple of times before today, it washes well. The air passes a little worse if one window is open, in order for there to be ventilation, it is necessary to open the second window, so the store will recommend two filters. It is expensive for the price, since it was put with an insert profile, it is much more airtight. There was a choice to put it cheaper with a simple window profile, but there are gaps between the window and the profile frame. In general, I did not expect such an effect, the most important thing is that my wife is happy, I can recommend it.