To use these men's shirts, simply put them on and enjoy their comfort. When it's time to clean them, machine wash in cold water, turning the shirts inside out and washing with similar colors. Only use non - chlorine bleach if necessary. After washing, you can either hang them to dry for the best results or tumble dry on a cool or low - heat setting. Remember, fabric softener can make the colors fade, so it's best to avoid it. Also, don't iron or dry clean these shirts to keep them in good condition.