To use these shirts, simply put them on and enjoy the comfort. When it's time to clean them, machine wash them cold and inside out with clothes of the same color. Only use non - chlorine bleach if necessary. After washing, you can either hang them to dry for the best results or tumble dry on cool or low heat. Don't use fabric softener because it might make the colors fade. Also, avoid ironing and dry - cleaning these shirts to keep them in good condition.