These rhinestone elastic belts are super easy to use. Just wrap the belt around your waist and fasten the buckle. They're great for adding a bit of sparkle to everyday looks or dressing up for special occasions. As for care, avoid getting the belts wet as this could damage the rhinestones. If they get dirty, gently wipe them with a dry, soft cloth. Also, keep in mind the California Proposition 65 warning about the chemicals in the product. Don't expose the belts to harsh chemicals or excessive heat, as this could affect their quality.