The mosquito mesh used in this system is fiberglass which is specially woven & treated for durability. Since this insect screen is electrostatically neutral it does not attract dust. The special weave is designed to allow more air & light. This system is available in horizontal & vertical movements. They can be fitted on existing windows, and installation and operation is very easy. In this roller insect screen system, the fiberglass mosquito mesh is welded to the roller system using high-quality plastic & metal accessories.