To use these shirts, simply put them on and enjoy their comfort. When it's time to wash, throw them in the machine on a cold cycle, and make sure to turn them inside out and wash with similar colors. If there are stains, you can use non - chlorine bleach. After washing, it's best to hang them to dry, but you can also use the tumble dryer on a cool or low - heat setting. Just remember, fabric softener can fade the colors, so skip it. And don't try to iron or dry clean these shirts to keep them in good shape.