for easy opening and closing, simple internal installation of the fly screen using the self-adhesive Velcro and Velcro tape, can be individually shortened to the size of a window, this inexpensive alternative protects interiors from annoying buzzing and stinging insects, the open-UP fly screen can be easily used for watering flowers or airing open the bed linen and close it again, the only tool required is a pair of scissors, thanks to the drill-free installation, the Open-UP fly screen is predestined for rented apartments