The toothbrush head of the Xiaomi Smart Electric Toothbrush T501 utilizes American DuPont bristles. The bristles are planted in a copper-free pattern.
For your reference, here is more information about the bristles:
1. Unlike traditional nylon bristles, DuPont bristles are made from a special material known as Tynex developed by the renowned company DuPont. This advanced material ensures that the bristles maintain their strength and shape even after extended use, providing consistent and effective cleaning performance;
2. The copper-free hair planting technology fixes bristles on the brush head through hot-melting, without using metals. Therefore, it avoids the problem of metal corrosion and rust, making it healthier and more secure.