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Summary: Goatee facial hair can be maintained using a Gillette Fusion Precision Trimmer, which keeps the edges clean and sharp. Shave a perfect goatee that lines up with your smile lines.
"A circle beard or a goatee is a beard formed on the chin that connects to a mustache. Maintain yours with a single blade by shaping the outside edges around your chin. As you are shaping, make certain the edges are even, line up with your smile lines and form sharp corners at the jawline."
eHow Article: How to Shave a Goatee