I've had my eyes out for a good leather strap for a few years now. Everything else out there falls into one of three camps: pure junk; straps made by well-regarded companies, but with questionable leather (they won't tell you where it comes from, but use telltale terms like "genuine leather"), and straps made by artisans out of great full-grain leather, usually sold on Etsy shops—but who maybe don't know much about guitar and bass players.
Anthology brings the good materials together with an understanding of what musicians want. I'm very happy with this strap. When I wrote to ask details about the leather, they were forthcoming about the tannery. I'm surprised they don't advertise this ... it's one of the better tanneries in Mexico, with a reputation for quality products and for being a leader in sustainability.
It would be cool if they offered vegetable-tanned leathers as an option. These tend to be stiffer when new, but break in beautifully and often wear more nicely than chrome-tanned. But this is very nice chrome-tanned leather, and is probably lower maintenance than veg-tanned.
It's also very comfortable. My other bass has a "comfort strap" on it — revered by grandpas and long-suffering rockers with back and nerve problems. But I can say that the Anthology is just as comfortable, and looks much, much better than that dorky thing.