【Energy Saving In Summer】Window seal is made of durable polyester material for easy sashing slide. Push through the tube, the zipper closed and the heat stays outside. This practical airlock prevents the warm exhaust air from returning into the room. The windows can be closed easily when leaving. There is no need to disassemble 【Easy to Use】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. In the end, close the zip tightly around the hose .