Using these cute two - toned ribbon caps is easy. Just place them on your head and adjust them to fit comfortably. They can be worn on various occasions, like parties or casual outings. As for the warning, be aware of the chemicals this product may expose you to. Don't let it come into contact with food or drink. When it comes to maintenance, you can gently hand - wash them in lukewarm water with mild detergent and let them air - dry. Avoid using harsh chemicals or machine - washing to keep them in good condition.