Gawd, 90 F and my PNW candy striped butt is melting to the seat somewhere between Carnation and heat exhaustion. So the water soaked bandanna isn't cutting it. I had a product from Techwear that is a water absorbing vest that I had never worn in the saddlebag. Time to try, soaked it and then poured a bottle of water over my t shirt and put it on. Instant Honda Swamp Cooler.
It lowered the temp at least 15 degrees in the shaddy side of the ride. I was very comfortable instead of cooking. This is now a must have on all my summer/simmer road trips.