To use this Hulk costume, first put on the padded muscle chest jumpsuit. It's easy to slip into and will make your child look just like the real Hulk. Then, place the Hulk mask on their head. Make sure it fits comfortably so they can see clearly. When your child is done playing, gently take off the costume and mask. To maintain the costume, spot - clean the jumpsuit with a mild detergent if it gets dirty. Hang it up to dry. For the mask, you can wipe it with a damp cloth. Keep the costume in a cool, dry place when not in use to prevent any damage. And always check the size before buying to ensure a good fit for your child.