Like LawnchairMan said, a rain jacket is a good investment for RAGBRAI. We always have one in our luggage; if there’s more than a 0% chance of rain in the forecast that day, we’ll stick them in our pockets as we roll out for the day. We might not use them if it’s 85 degrees and it’s a warm rain, but if it’s 72 and a cold rain, it makes things a lot more comfortable. Well, perhaps not a lot. At least some, though!
As for brand: whatever goes. We like either high-viz yellow or orange over black, as even though there are a billion of us on the road, the more visibility, the better! Id suggest something that fits pretty snugly, though. The flapping around of a loose fitting bit of rain gear gets annoying after a bunch of hours.
RAGBRAI does have a habit of throwing strange stuff at us. :)
See you in July.