Large Size: With an unfolded size of approximately 400cm/157.48 inches, this portable AC window seal can accommodate a wide range of window sizes. Please note that this window seal is only suitable for that open inward on one side. Zipper Opening: The window seal features a zipper opening, allowing for easy placement and removal of the hose and the sealing between the hose and fabric. The double zipper opening design provides additional flexibility for accommodating multiple exhausting hoses. Practical and Useful: The portable AC window seal is specifically designed to seal open and create a small opening for the exhausting hose of your portable air conditioner. This convenient design not only makes installation easy but also ensures better cooling efficiency for your indoor space. Easy Installation: Installing the ac window seal is a breeze. Simply clean the sides of the window opening, apply the fastening tape, and then attach the zipper opening of the window seal by starting from the middle of the window to a complete and secure coverage of the window. Quality Material: Made from wear-resistant fabric material, this ac window seal is built to last. It is also waterproof, windproof, and keeps out flies, ensuring a comfortable and enjoyable indoor air conditioning experience.