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 throw them in the washing machine to keep them clean. Just make sure to follow the normal machine - washing settings. As for storage, keep them in a dry and cool place. Also, avoid exposing them to extreme heat or sharp objects that could damage the OOfoam™ material.