Insects are allowed to stay outside. To keep pesky insects away from office or living spaces, permanently closing the windows is not an option, as fresh air is a fundamental requirement for a pleasant indoor climate. The Renkforce RF-IS-500 insect screen harmonizes these needs: fresh air and sunlight can flood the room, while unwanted visitors remain outside. It is quickly installed. The protective screen is fitted into the plastic frame with corner profiles and secured with Velcro. No drilling, no nailing - the window frame remains intact. All necessary components are included in the delivery.