Green Solution: This AC window seal stops warm air from coming in through hoses in air-conditioned rooms. This makes your room cooler faster and reduces your energy use and carbon dioxide output. Go green and save green with this AC window seal. Waterproof and : This window seal is made of 210T polyester material with PU coating, which provides thick and waterproof protection for your window and AC unit. Smooth Installation: With easy instructions, you can install this air exchange guard in minutes. The seal fits the window frame and cools down your room. Convenient to Use: Just zip the AC unit window seal around the hose and close the window gaps. The window seal is also washable and reusable for next season. Widely Used: This air conditioner window seal creates an airtight seal around your window and your appliance. It works with mobile air conditioners, vented dryers, and tumble dryers to keep your room cool and .