Hey Matthias, thanks for evaluating! To your note: It is quite normal and even wanted that the middle (which looks like a knot) will dissolve somewhat after the first use. The bristles are carved 100% from a piece of bamboo and are made smooth over hot steam and then bent, so a real knot would not be possible. As soon as the broom comes back into contact with water, this shape dissolves again. As a result, the bristles in the middle also become more freely and help to beat the Matcha even more creamier. The number of bristles refers not only to the outer ones, but also the interior. You can only help to foam the tea. Feel free to get in touch with us if there are any other questions :) Best regards, Laura