Ok, here is another point. Why not just wet wade if it is that darn hot in the summer? Why bother with waders at all? In that case, if you currently have neoprene waders, like I do, you can dress sparingly underneath them in early spring and late fall and be comfy. I have no gripes about neo. I am prone to cramping in cold weather, and neos keep me from cramping also.
I prefer to wet wade if I can, I will be wet tubing this year, after the water temps hit 65 or so, while others are struggling with waders on and off, I am fishing.