Heritage Collection Brushes

As far as I remember he is using OUMO knots for his brushes.

I actually think he has videos in which he says he uses Frank Shaving knots.

Nice... that’s good information to know, so I appreciate the comment. I do, however, wonder if Heritage Collection does the sterilization process themselves... And I only inquire about that because the OUMO knot I used was not nearly as gel-like as this knot; secondly, Heritage guarantees that every one of their “Heritage Gel” knots will have gel tips... That makes me wonder if they’re doing the sterilization process on  their own. Same with their “Gel tip” boar which I believe is an Omega knot... I’m assuming Heritage is doing the sterilization to give it “Gel tips” which basically for a boar just seems to increase the splitting of the tips, the clumping, and overall making the boar ready for use pretty much right away.

Probably, you are right. In his website now, he has two options (one SHD, other one SHD Heritage Gel).
He might have one more process over OUMO knots.