Using these Josef Seibel Hannah 03 sandals is easy. Just use the hook - and - loop enclosures on the strap to adjust the fit according to your preference. Put your feet in and start walking! When it comes to maintenance, you can use a soft cloth to wipe off any dirt or dust regularly. If they get wet, let them dry naturally at room temperature. Avoid exposing them to direct sunlight for a long time as it may cause the color to fade. Also, store them in a cool and dry place when not in use. And remember, don't use harsh chemicals or abrasive materials to clean them as it might damage the leather and other materials.