We wet wade with shorts over the top of polyprop long johns. The long johns help to protect the legs from sand flies but mostly are worn to keep the sun off. Burn time in the summer can be as short as 15 minutes. I wear a long sleave light sunproof shirt, long johns, a wide-brim hat and lots of sun cream.
The same long johns are great under waders in the spring and autumn for a bit of extra warmth.
Just about everyone down here wears them, they do the job well and cost very little.
All the best.
Mike