Feature: 1. No More Hot Air Ingress: The window sealing strip locks the hose in place between the window frame and the window, effectively preventing hot air from the portable air conditioner hose from entering. Our window sealing strip acts as a barrier against unwelcome guests, rain, and creates a sealed environment, allowing your room to stay cool for longer periods. 2. Enhanced Cooling Performance: By sealing around your open window and pulling the zipper to secure the hose nozzle, the sealing strip prevents warm air from backflowing. As a result, your portable air conditioning unit can use more efficiently, cooling your room in a shorter amount of time. 3. Reduced Energy Consumption: This window sealing strip helps to decrease energy usage and carbon dioxide emissions. During the summer months, the heavy use of air conditioning significantly increases CO2 emissions. By preventing warm air from circulating back into the room, the sealing strip aids you in saving on your electricity bills. 4. Easy to Install: The seal is easy to install, no drilling required. You do not need to buy window kits, hose adapters or other tools. Simply attach the straps to the inside of the window frame and to the window itself. Attach the window seal to the strap. Then, open the zipper on the window seal and place the A/C hose outside the window. Finally, pull the zipper tightly over the hose. 5. Universal Fit: The window sealing strip is compatible with all portable air conditioners and tumble dryers, regardless of the manufacturer. Whether your window opens to the left or right, is a sliding window or a skylight, the sealing strip can handle it all. It is suitable for windows with a maximum perimeter of 400/500 centimeters. Specification: Item Type: Portable Air Conditioner Window Seal Cloth Material: Polyester Weight: Approx. 365.00g / 12.88oz. Package List: 1 x Mobile Air Conditioner Window Seal 1 x Hook and Loop 2 x Tie Strap 1 x User Manual