I now carry 4 heavy duty trash bags behind my seats. I have the PRP, and they will take days to dry out if you ride in really hard rain or if it sits uncovered in the rain. If storms are evident, I'll put on the trash bags before riding into the rain. If seats are already wet, I'll put on the trash bags to keep my clothes from getting wet. Not a prefect solution, but it is something that helps. V-SHOT showed us this trick at Maggie last year, and it was really wet there that week!
Thanks for the information on the PRP seats and also for the garbage bag tip!
Bill