For anyone who is considering a hairpiece but doesn't know what they look like and the basics of how they work, you might be interested in the following Youtube video:

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This guy is a professional hairdresser, but also suffers from MPB and wears a hairpiece (or a toupee,as he calls it). In this 4-part video he shows how to take the piece off. and how to prepare and put on a clean piece,including scalp preparation. It is a good looking hairpiece,and definitely makes a big difference to his looks.