Improved materials: Made from high quality 190T polyester fabric with a PU coating to prevent water leakage. The zipper closes securely to maintain a tight seal. Easy installation: Secure your hose by opening the zipper, inserting the hose into the window frame, and zipping closed. No drilling or tools required to preserve cooling efficiency. User friendly design: No need to remove the window seal when the seasons change. Simple to install and adjust to any window size or shape, and it lets you open or close the window whenever you want. A cozy home, with easy reinstallation for summer. Wide compatibility: Designed for venting through vented clothes dryers or light wells, exhaust dryers and dehumidifiers, as well as common tilt windows and portable air conditioners. Versatile for a range of home setups. Use scenarios: - Use with a portable air conditioner in a tilting or sliding window to seal gaps and improve cooling efficiency. - Vent a vented clothes dryer or dehumidifier through a window without removing the seal. - Switch seasons easily by reinstalling the seal for summer to maintain comfort.