To use this cap, simply place it on your head. It should fit snugly due to its flexible jersey - fitted material. You can attach patches to the hook - and - loop panels according to your preference. When it comes to cleaning, you can gently hand - wash it in cold water. Avoid using harsh detergents as they may damage the material. After washing, let it air - dry. Store it in a cool, dry place to keep it in good condition.