wheaters
Elio Addict
With a proper gasket seal - as in my Halliburton or Pelican camera cases - those panniers could be made watertight. Of course they wouldn't be exactly cheap, but those Pelicans are at least reasonable. Plus they're available in sizes, capacities, and colors to handle just about anything you want to carry. Now the aerodynamics need a little work . . .
Waterproof gasket is good, now we just need a portable pressure washer to get the dirt off after the run past the farmyard gate, before carrying them inside.