Whenever I think about toothbrush only Colgate Zig Zag comes in my mind. It wow types of toothbrush. I am using this Colgate Zig Zag brush from more than 8 years and still I trust on Colgate Zig Zag brush only. Because it is very flexible, it reaches every corner of the teeth and it is very gentle on the teeth. I really feel good to have this kind of toothbrush in my daily use. this is the best every I used.