two flexible points for deep and smooth oral hygiene. effective yet gentle at the same time. this toothbrush is equipped with two flexible points that make oral hygiene both effective and pleasant. the first flexible point is located right between the head and the beginning of the handle and is like una a semi-rigid plastic ball which, when we try to move it with our fingers, makes us say "wow, this is so stiff, it doesn't move at all," but then, in fact, when we go to brush our teeth, we realize that it gently follows the shape of the arch and does its job wonderfully. the second flexible point is easily visible to the naked eye as it appears as una a small zigzag area located about 1/3 of the way down the toothbrush.