Rather than cart about a wind-sensitive umbrella, today’s invention is a low-hassle alternative.
When being rained on, one’s coat could start to shake itself, just like a longhaired dog. This sneeze-like shaking might be driven by a number of synchronised mobile phone-type oscillators attached inside the garment.
These could be coordinated so as to create waves of oscillation and thus shed moisture most effectively. People would soon get used to the apparent all-over body tremor effect, especially if it only occurred on wet days.