I went with the Neoprene (think wet suit). Two toned black and bright orange. They aren't one size fits all - each are made for the exact seat you order them for.
My 4Runner is in the shop right now, but should be done this afternoon. If it is I'll post some pictures of the seat covers.
If you want the best you absolutely can't beat Wet Okole. I bought a set for my truck and I love them! They are by far the best interior mod I have done! They are custom made to fit your make/model so they fit like a glove and look like they are stock. They are made of high quality neoprene and are completely waterproof so you don't have to worry about getting them dirty. You can also customize them with different colors, trim colors, pockets, pouches, and even add seat warmers. I could go on forever about how much I love mine and how awesome they are. Really the only downside is the price, they are a bit on the expensive side but worth every penny IMO.