Square umbrella


In every storm, many (brand-new) umbrellas are destroyed, and that is because the thin metal ribs break. When using 8 ribs, there is not much room to make the ribs thicker and stronger.
Four plastic ribs can be much stronger than 8 metal ribs, and a square umbrella of course also is waterproof, and windproof then as well.

With 4 thin sewed-in extra ribs, you still have a round umbrella!

Quick tent.
Quick tent.

I am searching for people who want to build such umbrellas and tents. Do you, then contact me!?