To use these T-shirts, simply put them on and enjoy the comfort. When it's time to wash, machine wash them cold inside out with clothes of similar colors. Only use non - chlorine bleach if necessary. For the best look and feel, hang them to dry after washing. You can also use a tumble dryer on a cool or low - heat setting. Be careful not to use fabric softener because it might make the colors fade. And remember, don't iron or dry clean these shirts to keep them in good condition.