To use this Hulk costume, first put on the printed jumpsuit. It's easy to slip into and will make you look just like the Hulk. Then, put on the felt mask. Make sure it fits comfortably on your face. When you're out having fun in the costume, be careful not to roughhouse too much and damage it. After you're done wearing it, gently take it off. To clean the jumpsuit, you can follow the care instructions on the label. Usually, a gentle machine wash in cold water should do the trick. For the mask, you can spot clean it with a damp cloth. Store the costume in a cool, dry place to keep it in good condition.