Here's how to get the most out of your XENOS Rad Vigilante long - sleeve t - shirt. First, choose the right size from S to 4XL that fits you well. When it's time to wash, turn the shirt inside out and use cold water. Wash it with similar colors to prevent color bleeding. Only use non - chlorine bleach if there are stubborn stains. After washing, hanging it to dry will keep the shape and color best, but you can also use a tumble dryer on cool or low heat. Don't use fabric softener because it can make the colors fade. And remember, never iron or dry clean this shirt to keep it in great condition for a long time.