If taken care of properly, your leg wraps will last for years of festival fun!
Leg wraps may be thrown in the washer if you have a lingerie bag. The little mesh or light cotton bags keep them from getting tangled around other clothes or parts of your machine.
If not its best to hand wash them. Feel free to use a small amount of your regular detergent.
To dry, it's best to hang them. This prevents the silicone on the top of the leg band from deteriorating. However you can throw them in the dryer on a cool setting if you're in a pinch!
Hope this helps,