Keep the Hot Air Out: The window seal for portable air-conditioners kit keeps the cool air inside your room by effectively diffusing the hot air out of the window. Preventing warm air circulating in your room, keeps your room cool. Convenient and Practical: Made of nylon material, simply zipped in place between the window and window frame and can regulates the air exchange efficiently and keep out dust and rain. The windows can be closed easily when leaving. There is no need disassemble. Easy To Install: Simply apply the adhesive hook tape to the inside of your window frame and to the window itself. Attach the window seal to the hook tape. Then, open the zip on the window seal and place your air conditioner hose out of the window.At the end,close the zip tightly around the hose. Non damage Window: The ari lock seal is suitable for commonly-used window types(tilting windows or wings)except turn-tilt skylight product is not suitable. Fits window with a maximum three sides of 400 CM.