The undyed bristles are natural, "blonde" boar, and arrive with the tips already splitting, making for a soft brush right out of the box and a much more pleasant break in period.
One thing I noticed about the BBE boar is that it appears the tips are already split, or starting to split so the break in process is going to be much faster than the usual process with a boar.
This actually seems very unusual to me since I thought that the tips split due to usage. Any idea how they can be split out of the box? Has anyone seen this phenomena with other boar knots? I've only only tried a few Semogue boars and I don't remember the tips having been split out of the box. Not that this would be bad - sounds like a nice feature to speed up the breaking in process and make the initial shaves more comfortable. Just curious!