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