Well My SP jets did not fit the boot very well. I had to wrestle a lot to slide the boot into them. Then I purchased a paid of Hollis F1 fins for drysuit use and my life has become some much easier. I do not have a p-valve because it solves a problem that has one in a million chance of happening. I have never had to hold my pee (and you may interpret it in anyway you like
) Color? I have yellow because I wanted one with good surface visability. Red and Yellow were what I was looking at. I was told that yellow will get stained easily and I see that happening. I do not however see it happening to the point where it wont remain yellow anymore. Black is black and will look like it is after 100 dives. Other colors may not look new after sometime but during a drift dive I am usually the first one to get picked up by the boat because my bright yellow stands out so much more.