Missed this one - what we wear under waders in hot and cold weather is a subject I am starting to look into more and more.
Seems that the Helly Hansen baselayer stuff is very good, going to see if I can play around with some of that gear.
And then if it is really cold (like recently), I do tend to wear a really lightweight fleece bib and brace I have had for years - worn it so much that the knees are starting to wear out, will have to get a new one.
Increasingly I am looking more and more outside of the fishing world to find really good clothing items to use for bass fishing - I know that Simms and Patagonia are awesome, but I want to see if some of the gear from the technical outdoor market will work well for us at more reasonable prices.
Lots to find out.
Hardy Greys often say to me that a lot of people who reckon their waders are leaking is actually because they are wearing things like a pair of jeans under them, and all the sweat that gathers makes them feel to wet that the customer is convinced it has to be a problem with the waders.