Simple design with amazing achievement in bristle technology. The bristles contain charcoal reactive ion which can easily adsorb the dental plaque on the surface of teeth to make teeth healthy and white. Ultrafine staggered ends of the bamboo charcoal enhanced bristles can go deep into the various gaps between the teeth to have a deep cleaning, the soft bamboo charcoal enhanced bristles with super adsorption capacity takes care of gums and protects them from injury while brushing. Moistureproof, Antibacterial. The bamboo charcoal enhanced bristles are more moisture proof and antibacterial than normal bristles which can help to keep the bristles dry, keep away from bacterium breeding, leaving the mouth more comfortable, healthy with clean, and white teeth. Why only SOFT? That is an easy one to answer – Most dentists will only recommend a SOFT bristle that is why… Also the new advancement in bristle technology makes this bristle only able to be manufactured in SOFT. The Handle. We use MOSO bamboo – why – because bamboo is part of the grass family so we are not cutting down trees – MOSO Bamboo is one of the fastest growing bambooês in the world and our friendly PANDAS do not like to eat it. We do not use PLANTATION Bamboo we give the local farmers an income from land that is really only good for growing Bamboo…. And YES they are manufactured in CHINA – FAIR TRADED which means everyone gets a fair go and a fair pay.