From my experience and what I've heard, generally polyester swimsuits seem to last much longer than nylon ones. I had one 100% polyester which has lasted for some 10 months with almost daily swimming and is still in perfect shape. However nylon+spandex, though shorter lived, feels much more comfortable, more stretchy and easy to swim with (I think most competitive/racing suit are nylon blend, not polyester). So it seems each has its own advantage.
Also interested but not in poll questions: is your suit chlorine resistant or has sun/UV protection? Thanks :)
