1. Mesh Material: These windows are made from fine mesh fabric, usually of fiberglass, aluminum, or synthetic material, with a tight weave that allows air to flow through while blocking insects.

2. Frame Construction: The frames of these windows are typically made of lightweight materials such as aluminum or PVC. The frames are designed to be durable yet easy to open and close.

3. Variety of Designs: They come in various designs to suit different types of windows and installation requirements. Some are fixed in place, while others are hinged or sliding to allow for easy access and cleaning.

4. Installation Options: They can be installed on different types of windows, including casement windows, sliding windows, and even doors. They can also be custom-made to fit specific window sizes.

5. Functionality: Openable net windows are designed to be opened and closed easily to allow for ventilation without compromising on insect protection. They often feature mechanisms like magnetic strips or spring-loaded hinges for secure closure.

6. Benefits: They help maintain good indoor air quality by allowing fresh air to circulate while preventing the entry of mosquitoes, flies, and other pests. This is especially beneficial in areas where insect-borne diseases are a concern.

7. Maintenance: They require minimal maintenance, typically needing occasional cleaning to remove dust and debris from the mesh. The frames may require occasional lubrication or adjustment to ensure smooth operation.

Overall, openable net windows provide a practical solution for enjoying fresh air indoors while keeping unwanted insects outside, contributing to comfort and health in residential and commercial settings.