To use these sandals, simply slip your little boy's feet into them. The 3 - point strap will adjust to fit securely. When wearing them, they're great for beach trips, walks on the sidewalk, or any outdoor play. Just avoid wearing them in very rough or sharp - edged areas as it might damage the rubber. For maintenance, after a day at the beach, rinse them with fresh water to remove sand and salt. Let them air - dry in a cool place. Don't expose them to direct sunlight for too long as it could affect the rubber quality. With proper care, these sandals will last for a long time.