Enjoy a comfortable living-space without spending a on electricity bills and stay cool all long seal is only suitable for commonly-used tilting window or wings It is suitable for window types that open to the left or window that open to the right, bottom hung window, or skylights ( not sliding window or doors) But unable to use it on a left and right sliding window or door Ideal-for those who use portable air conditioners to cool their homes or offices Perfect for top hung window, tilted window, and casement window, and remove without leaving-residue non-woven fabric, the seal blocks hot air from entering through your window and keeps cool air inside