These Venice Beach California Classic Caps are easy to use. Simply place the cap on your head and adjust it for a comfortable fit. When it comes to maintenance, you can spot - clean the caps with a mild detergent and a soft cloth. Keep them away from direct sunlight for long periods to prevent the khaki color from fading. Also, remember about the California Proposition 65 Warning. Avoid contact with the chemicals mentioned as much as possible. If you have any concerns, check the details on www.P65Warnings.ca.gov.