High bristle density means greater chalk clearing and this brush packs more bristles than any other.  Instead of sticking bristles in holes we carve out the whole area and pack it completely full of bristles.  There is no free space, simply a block of packed bristles, it doesn’t get any better.   Everyone has different brushing routines so why aren’t there more bristle options?  This brush comes in two different bristle stiffnesses: medium and hard.