Does donovan tea wear a wig?

I just saw the Lettermen in concert last night at Kleinhan's Music Hall in Buffalo NY. Donovan Tea has his own hair. I fact he wore it in a pony tail. They put on a great show. They are all so talented individually and make magic as a trio.

That pony tail is a wig. If you see him off stage he always wears a cowboy hat and has no pony tail.