The most important part of the toothbrushes are the bristles. These bristles are in direct contact with the teeth and gums during brushing. They are there to clean, but not to cause damage to the gums. MorningKiss bristles are made with DuPont Tynex* filaments. Tynex filaments have Hexagonal and Rounded bristles to provide the best possible cleaning while preventing damage to the gums. Available in specific purpose usage models with hard, medium and soft bristles.