I'm sort of cheap and want to be warm and dry when I hunt. Found that wearing cheap fleece athletic clothes is the way to go. (under my waders and coat of course)
Look for pants and shirts at Walmart around this time of year. (it's marked down to like $5 for a shirt or pants)
The fleece clothes...if you do get wet you can take them off, ring em out, and they're pretty much dry again. (been there, done that)
Cotton is no good and I can't afford wool clothes.
Starter brand is usually available now for that el cheepo price.