Aside from convenient opening, it's also famous for excellent sealing operation. It's totally sealed off with no gap, leaving zero opportunity to mosquitos.
The advantages of meshes of great quality rolling Fiberglass Screen Mesh are wrapped with ninon. It's built in using a locating rod within the monitor. It's not hard to start and seals off entirely to withstand violent wind.
One process can be deliberately seen through the creating of poor-quality rolling Fiberglass Window Screen where primitive strips are put on the paths and meshes are stuffed indoors, and meshes are usually torn, leaving space to mosquitoes. So you try to pull on the meshes to find out whether they drop out before buy.