The package includes three pollen grid, bringing it to one and this should be changed after about 8 weeks, so it is enough for one summer season. Already directly after application and a few hours airing the air in the bedroom was a lot better, one has noticed it, that the air was "filtered" in any way. Really good. The view is limited by the web, but you can still easily see, it does not bother. The application works as usual flyscreen with a Velcro tape that is. This install is not a problem, but the fleece does not hold well to the adhesive tape. I took a hot glue gun to help to make the corners firmly and in case I have a thin layer of hot glue attached to the sides so that it is not likely to solve. Keeps now after a week still super. When hot glue, however, make sure that you install this not too thick, otherwise you have to fully close the window problems. In itself, this pollen is therefore recommended.
