I'll be enjoying these over the next couple of days ...
I've had a few brushes from Haryali over the years and these came in as a pleasant surprise.
I had a black fibre brush from Edwin Jagger a few years back and it was a huge disappointment. These, I thought looked better and bought one in with the intention of pulling the knot into some else as I suspected the handle would be hollow plastic. It is infact a kind of stone resin! Heavy and sure-feeling in the hand. I loved it (the black one) so bought the white one as well. I think they also sell a really proletarian wooden handle one, as well.
In terms of feel, they are about as soft as PurTech if you remember that fibre. PurTech was supposed to be a competitor to Muhle's Silvertip Fibre, but it didn't come close - but, it did replicate something like Best Badger quite well. This fibre is about there. The backbone is down at the knot, giving a loose, free-flowing top half to three-quarters which can build up a delightful bulb of lather.