So what you are all saying is, that those spit legged aprons, they sell at the various ceramic suppliers, don't really keep you any cleaner than a normal apron?
Benzine, I think the split-leg aprons are better than standard aprons... they don't bunch up in the middle when you try to get close to the wheel and well-designed ones do cover your legs a lot better at the wheel. The thing I ran into was that I still have to wash *something*. With aprons, I either keep wearing the same apron that gets more and more dirty until I clean it... which means either paying for one or more spares, or having to remember to clean and dry it between sessions. Of course, I always remember it needs cleaned when I pick it up to put it on. So my problem isn't standard versus split-leg apron... it's apron versus no apron.
Cotton aprons don't repel water, which bothers me more than the clay... I don't mind clay on my jeans, but I mind having wet jeans. A wet apron with wet jeans underneath isn't an improvement. With towels, it takes a lot more to get my jeans wet, and if a towel does get too wet, I just toss it aside and take another from the pile... not so easy to do with an apron.