What do I look for when buying an ergonomic office chair?

https://feddit.org/post/662094

What do I look for when buying an ergonomic office chair? - feddit.org

I am looking to replace my old office chair and would appreciate advice or recommendations.

Years back I bought a used Herman Miller Aeron, it was way out of warranty but also way cheaper vs buying new. Totally worth it, I do like mesh chairs and the Aeron is one of the best in its class. Plus it has a ton of adjustable levers if that’s your thing.

The only thing I screwed up was the sizing, those chairs come in different sizes and I probably should have gone for one size smaller but it’s not a big deal. Sizing is something to keep in mind when chair shopping, they’re not all one size fits all and you may want something specific to your height/weight for better support.

Can you replace the meshing on those things or is that thing just trash after some mild wear?
I had a chair with an extra sturdy (allegedly) textile for the seat and that still tore over the years from the friction. At least I can still sit on it but on a mesh chair that would be impossible. I'm just wondering if those ridiculously expensive ones have at least modularity & replacement parts, but if that's not the case then I see even less the point in them. Not that I could afford them either way, but at least then they would've made sense as something to possibly save up to, even if used.