Nylon Bristle - Fuchs utilizes a state of the art end-rounding and polishing process with superior quality control at every stage. This critical step ensures that there are no rough bristle ends to harm the gums or the enamel. Look carefully at Fuchs toothbrushes and you will see a very dense bristle field, a feature found only on the world's highest quality toothbrushes. This density prolongs the life of the toothbrush as well as providing a more effective brushing action.