This window net and velcro kit is a great and non-violent protection against nuisance insects. The netting consists of fiberglass coated with plastic + self-adhesive Velcro. Easy application without the need for difficult assembly, Velcro - self-adhesive applied to the window frame must be smooth and cleaned as well as degreased! NOT LATER THAN TWO HOURS stretch the net, trim off excess parts.
RECOMMENDATION- to better secure the net in the Velcro, use a small toothbrush - ideally an old toothbrush and use the bristles to gently push the mesh into the Velcro hooks.