How many kinds of bristles are there in the toothbrush? Which is better?

The bristles of toothbrushes are usually made of nylon, PBT and PP.

First of all, look at the softness: nylon bristles are the softest, followed by PBT bristles, and PP bristles are hard. Generally, hotel toothbrushes are all PP bristles;

Secondly, in terms of durability, nylon bristles have good elasticity and toughness, PBT bristles are slightly worse, and PP bristles have poor resilience and are easy to fall off after several uses;

To sum up, nylon bristles or PBT bristles are better for ordinary household toothbrushes, and PP bristles are cheap and suitable for hotels or apartments.