I like using natural bristles for brushing my teeth. I've been purchasing this brand for years. A very fine brand of toothbrush. A word of caution though, the "hard" and the "medium" bristles are just what they're called - "medium" is still very hard. I typically used hard nylon toothbrushes before switching to natural wood. So when I made the switch, I assumed the "hard" with natural bristles as well. Hmmm, quite a mistake. WAy too hard. Turns out that the "soft" bristles work best for me.