To use this cap, simply place it on your head and adjust it to fit comfortably. You can customize it by attaching your favorite patches to the hook - and - loop panels. When it comes to maintenance, you can machine - wash it in cold water on a gentle cycle. Avoid using bleach as it may damage the fabric and the embroidery. After washing, let it air - dry. Be careful not to over - stretch the cap when putting it on or taking it off to keep its shape.