How to use: Simply put the cap on your head. It's a great accessory for daily wear, outdoor activities, or sports. Attention: As mentioned, this product has chemicals that may cause harm, so avoid any direct contact with your skin for long periods. Maintenance: You can gently hand - wash the caps in cool water with mild detergent. Let them air - dry. Don't machine - wash or use bleach as it may damage the cap's quality.