I quit chamois and padded bike shorts a while ago. Moisture build up from reduced airflow down there caused more problems than it solved. I roll centuries and multiday 80+ miles in regular athletic poly/spandex underwear and regular athletic shorts. Not every pair of underwear and athletic shorts are the same but I found a pattern of each that I know will just work. Most of mine are from regular retail places like Walmart and tjmax like Russell brand. I do have a lightly padded gel seat but most of my riding is in gravel and it takes the edge off. The padding is outside my shorts and not trapping heat inside. If on road I'm sure any old fitting seat would be fine for me.