Oral-B Cross Action has been clinically proven to remove more plaque than a regular manual toothbrush with its unique angled CrissCross bristles that lift and sweep away plaque; CrissCross bristles: Are positioned in opposing directions and are designed to flex and then straighten, actively penetrating between teeth and along the gum line to lift out and sweep away plaque; Power Tip bristles: Are extra long to wrap around teeth and help clean hard-to-reach places; Blue Indicator bristles: Are