Infomercial Tools What Is The Name Of That Hair Tool In The Infomercial To Make Your Hair Look Like It Has Volume?

What is the name of that hair tool in the infomercial to make your hair look like it has volume? - infomercial tools

Recently, I saw this infomercial for this thing that makes the hairs hidden on the crown of his head under his hair look like hair when she volume, but not annoying. I have the name and have seen each other since the infomercial. Can someone help me? I remember that, outside of Fresno, California.