Native makes a great seat for the Mariner 12.5 Propel, but sitting in it for 9hrs still requires some extra padding for me. What extra padding I had wasn't working good enough, so got desperate after a long day of fishing/sitting and facing a 2nd day in row. Went to Wally World and found this $12 fire-engine red heavy-duty rubber donut (they apparently do not come in camo). Best 12 bucks I've ever spent. A second 9hr day in the saddle was much more tolerable with my new seating upgrade. Knowing glances were exchanged at the launch but no one spoke a word. I sat upon my donut and pedaled out comfortably and began to catch fish. Comfort is more important dignity.