NanoNuno Umbrella never gets wet
The NanoNuno umbrella uses nanotechnology based off the lotus plant to always keep dry, using the principle that the microscopic, rough nanostructure on the leaves of the lotus plant simply cause dirt and moisture to roll off because there is a much smaller surface area to which things can stick to than on a smooth surface. So after the umbrella gets wet you just give it a quick shake and it should be good to go. And for only about $100 you can't afford not to buy it! Although that's about the only thing you'll be able to buy because you've just dropped $100 on an umbrella.