Here's how to get the most out of your 'Inside Wonderland' long - sleeve T - shirt. First, when it's time to wash, turn it inside out and put it in the washing machine on a cold cycle with clothes of similar colors. Only use non - chlorine bleach if there are stubborn stains. After washing, you can either hang it up to dry for the best look, or tumble dry it on a cool or low - heat setting. But be careful with fabric softener, as it can make the colors fade. Also, don't iron the shirt and don't take it to the dry cleaner. By following these simple steps, your T - shirt will stay in great shape for a long time.