The lightest rain gear however, is to bike naked.

OK then, in briefs. I’ve done that on warm summer days and it’s like bathing as long as you keep up the speed and make sure you put on something warm as soon as you stop.
As for colder days I’m planning to buy something expensive... Since I don’t ride a recumbent, I need
biking rain gear that goes all the way down your back even when you’re ”lying” on the handlebar. And biking gear is always so expensive compared to what you can find in the outdoor supermarket.