Seriously? I use the Sprenger stirrups that have the black rubber at the base. They help with the arthritis in my knees. I don't show hunters, but now you've got me curious. I'll have to check up and see if they are allowed at dressage shows.
As far as I know they are still allowed as USDF shows, and seem to be getting more and more popular at the lower levels. I bought a pair of wide track composite stirrups recently to help with knee and ankle pain. I wish I could have afforded a pair of metal ones. I really hate the light weight composite stirrup.
RH Queen O Anywhere "Sydney"
2009 Sugarbush draft