Toppers always come with toupee clips, and when you bend the toupee clip it is intended to snap into place onto your own hair to hold the Topper in place.
They come in many designs; they can be made as a Pull Through so you can pull your own hair to blend with the Topper’s hair. They can come with a lace front or Monofilament top so you can part the hair anywhere on the crown. All Toppers are made so you can add volume where ever you want on the crown of your head.