Stop cool air leaking out around the exhaust hose: a fabric zipper seal that closes the window gap on a tilt and turn window, so a portable air conditioner works with less warm air getting back in. Closes window gaps: Seals the space a hose leaves open in a tilted window, so less warm outside air seeps back in while the unit is cooling. Tool-free adhesive and zipper fit: Attaches with adhesive tape and a zipper, so it goes up in minutes with nothing to screw or cut. Flexible mixed-fabric material: Adapts to the shape of a tilt and turn window rather than a single rigid fit, so it works across slightly different window sizes. Reusable, compact storage: Folds away after the season and comes back out again next summer, rather than being a one-use fix. Specifications Material Mixed fabric Length options 300 cm, 400 cm Package dimensions Approximately 31 x 24 x 4 cm Weight Approximately 290 g Installation Adhesive tape and zipper, tool-free Choose the length that matches your window's perimeter with a little to spare, and press the adhesive strip onto a clean, dry frame for the best hold. Feed the exhaust hose through the zip opening before sealing the rest of the gap. Fit it to a tilt and turn window wherever a portable air conditioner's hose runs outside.