They spelled Sewogue wrong
No, it’s the same boar hair used in their 2018 TSN LE, but different from the SOC.
It’s supposed to be harder to find, with only limited stock available, which is why they can’t use it in a regular brush edition, like the SOC.
Thanks for the info. I have the new 2020 tsn boar and I owned a soc boar years ago. The break in period for the new brush seemed to be substantially quicker than I remember with the soc, and because of this, I suspected the hair was different. It really is a nice brush (which I suppose it should be for 60 bones).That's correct, different than the SOC hair. Same handle type. If the SOC is floppy for you this is a good alternative. I like this brush and the SOC both.