Every hoodie will, of course, come with its own set of washing instructions. As a general rule, don't expect to dry clean any. They come with specific dyes and prints that will leak (or otherwise be damaged) by dry cleaning. When you put the hoodie in the washing machine, use a cold wash that isn't too intensive and flip it inside out. If it's colored, follow the usual rules and wash with like colors, avoiding your whites. After the cycle completes, hang dry it if possible. If you need to use a tumble dryer, set it to the most delicate setting. You might need to put it through a couple more times. Finally, you might like to iron your hoodie depending on the material. If you choose to do this, turn it inside out first. Again, this stops any damage to the prints or dyes.