You know you’re supposed to open them out and hold them above your head, right? They don’t keep you dry if you don’t do that.
Thankfully, I’ve fixed the above fundamental error.
They don’t keep you dry. They give you a sense of being dry. Whenever my GF wheels hers out I do an inward eyeroll. The extra ‘dryness’ affected by this billowing mass of fabric and pointy wires, is really not worth the faff of having to hold the thing/negotiate it around objects, people, etc.
Weatherproof stuff actually covering you is ace though.
Seriously. If the umbrella had never been invented and someone went on Dragon’s Den with it as a new funding idea, the concept would be laughed out of the studio.