The window seal creates an environment isolated from the outside by connecting the window frame and window, effectively blocking the hot air from entering and the leakage of cold air, and keeping your room cooler for a longer time,and provide a comfortable environment. Features - Color: White - Material: Synthetic material - Size: 400.00X40.00X0.10cm/157.20X15.72X0.04inch - It prevents the hot summer air from entering your room and makes your air-conditioner much more efficient as it was before. - The seal cloth also effectively insulate , dust, etc. into the room. - You can open or close the window at any time without removing the window seal. - Once the weather turns chilly, you can also it with ease. - Enjoy a cooler environment in summer. Windows seals around your open window blocks the return flow of warm air. Package list: 1 x sealing cloth