This product represents the ultimate merger of superior dental care with environmental awareness. The EkoTec's bristle field is compact, in keeping with the latest trends and advances in European dentistry, to ensure easy access to all areas of the mouth. Comes with three replacement heads, and refill packs contain 4, so you should always have some on hand. Dentists tell us to change brushes every 4 to 6 weeks, and especially after bouts with colds or flus. By improving your toothbrush replacement habits, Fuchs EkoTec system enhances your dental health.