Aquafresh Flex Triple-Action with tri-cut bristles to help thoroughly clean your teeth. 1. Extend outer bristles designed to clean deeper between teeth and along the gumline. 2. Center bristles are specially cut to help fit around the top of your teeth to clean away food debris and plaque. 3. Elongated control tip helps you clean plaque, especially around your back molars. Patented flexible neck bends to absorb brushing pressure to help prevent gum irritation.