How Do I Hide My Hair Under a Wig / What is a Wigcap?
A wig cap is a nylon cap that is made for hiding hair under a wig. They are usually sold by the same retailers that sell wigs, and are usually around $5 or less. You can use a wig cap multiple times, and for multiple wigs. Usually it is good to get a skin colored cap, or one that matches the wig you plan to wear it with.
How to Put on a Wigcap…
How many times do you expect to wear a costume before "retiring" it