Soft toothbrush (blue) features a round brush head with over 12,000 bristles for excellent, everyday brushing. Sensitive toothbrush (white) has more than 18,000 soft, microfine bristles that clean gently without irritating tender gums or sensitive teeth. Designed with multidirectional bristle technology due to 360° of bristles around the brush head that reach multiple surfaces of the teeth and gums all at once and provide a clean, polished feel.