Dry brushing the skin requires a firm bristled brush that is swept across the skin, from toe to head. It's called "dry" brushing because both your skin and the brush are completely dry (although some people apply a dab of body oil to the brush before using it).
Dry brushing exfoliates the skin just like body scrub products do. The bristles of the brush manually sweep away dull, rough, flaky skin cells. After a dry brushing session, your skin will feel softer and smoother. The brisk brushing stimulates blood circulation.
It can be used in the shower (many customers love using this as a shower back scratcher!)
While dry brushing is a relatively new trend today, it actually has its roots in ancient times. It's common in ayurvedic medicine but many cultures, including the ancient Greeks and Japanese, have used skin brushing to cleanse and beautify the skin.