The Velcro is attached in the doorframe, but this is not so easy, because the adhesive used does not hold very well. We have the grid not only circumcised, as other reviews have warned. Therefore, the grid overlap 30cm good with us. (80 door)
The weights, which are not particularly suck, because they do not really brignen weight. In wind these mosquito nets are unusable: either they dissolve by Velcro, or glue the Velcro straps are after.
So we got exactly what we expected: a temporary solution for a rental apartment in which must not be drilled into the door frame.
But we can forgive three stars for the mosquito nets, as it (under normal weather) definitely protects against flies and mosquitoes ...