To use these sandals, simply slip your feet in. They're great for casual wear around the house, at the beach, or after a workout. When it comes to maintenance, you can toss them in the washing machine to keep them clean. Just use a gentle cycle and let them air dry. As for precautions, avoid wearing them in extremely rough or sharp - edged environments to prevent damage to the foam. Also, if you notice any signs of excessive wear, it might be time to get a new pair.