Hot Air Stop 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 for longer and save electricity charges. Energy Loss Reduction This window seal contributes to reduce energy consumption and to lower carbon dioxide emissions, which is particularly high in summer due to the massive use of air conditioning. Preventing warm air circulating in your room Convenient and Practical It's made of durable and waterproof 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 to disassemble. Easy To Installation 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. Applications It is suitable for all portable air conditioners and tumble dryers, Whether for windows that open to the left or windows that open to the right, bottom hung windows or skylights, Window seal will do the job.