There's only one real folding umbrella - the Knirps. The problem is (and likely the reason the company is clawing its way out of bankruptcy - It's way too expensive. I own a Knirps purchased in Germany about 40 years ago that still works perfectly. My wife has a 66 Baht folding umbrella that seems to work just as well. (ok, it's only 3 years old, but do the math...).
We ended up buying 6 el'chepo's for both vehicles. Still saved baht.