at will: You can cut it into the shape you want at will It can be opened at any time: when you want to open and close, you can untie a corner of the screen window ( just open screen without moving the hook and loop fastener), and then stick the screen window back after opening and closing Strong Snap Button: strong adhesion, not easy to fall Fine mesh: and Arbitrary disassembly and washing: when you need to clean, just take the net off the hook and loop strip directly