To use these denim caps, simply place them on your head. They're great for daily wear, outdoor activities, or adding a touch of style to your outfit. As for care, you can gently spot - clean the caps with a mild detergent and water. Avoid using harsh chemicals. Also, remember about the California Proposition 65 warning. This product contains chemicals that may be harmful, so handle it with care and keep it out of reach of children. If you have any concerns about the chemicals, visit the provided website for more information.