TheNordics Expert Series Curve Toothbrushoffers the same amazing cleaning as the Premium Series brushes, but the brush handle has a slight ergonomic curve to aid manoeuvrability when brushing. The handles are also slightly longer, which makes it even easier to get to the hard-to-reach places in the mouth. The hexagonal shape of the handle allows fine manoeuvring in the oral cavity.Each brush has 6,580 high-quality bristles that have gone through a process of rounding in order to deliver a fine brushing experience without irritating sensitive gums.Each Curve brush also has a protective cap that protects the bristles from unwanted contaminants.The fibers of the SOFT brushes have a diameter of 0.10 mm.Nordics. Bulgaria