To use these Vital Petra mule sandals, simply open the hook - and - loop closure, slip your feet in, and adjust the closure for a comfortable fit. As you walk, the nubs in the footbed will massage your feet naturally. When it comes to maintenance, you can use a soft, damp cloth to clean the leather outer material. Avoid using harsh chemicals as they may damage the leather. For the textile inner material, a gentle brush can be used to remove any dirt. Also, make sure to store them in a cool, dry place. If the sole starts to show signs of excessive wear, it's time to consider getting a new pair to keep your feet safe from slips.