I'm 50 and have been chasing waterfowl since I was 15 years old. Started with old-school rubber chest waders. In college a buddy of mine worked for Cabela's (I live in Nebraska), and he introduced me to neoprene waders in the early 1990's. Much easier to patch, warmer, stretched as you moved. Very comfortable.
I sweat like a dog and constantly found my feet were cold. Kept trying different socks, putting on more and more to try and keep warm. Then friend suggested to wear less clothing under my neoprene's. And switched away from cotton (remember, this was early 90's).
I moved to light hiking / smart wool socks, poly long underwear and moisture wicking wader pants. Made all the difference. When I'm walking to blind or putting out decoys, I remove had and gloves and try to dump heat / not start sweating. Once I settle down in the blind bundle up and stay warm. Key is to not start sweating.
I currently own Cabela's Men's Ultimate II hunting neoprene waders . They serve me well. My brother switched to Cabela's Men's Breathable Hunting Waders with 4MOST DRY-PLUS, he really likes them. I like his waders, but feel my Ultimate's are more durable and better in extreme cold. I may bet a pair of breathable waders for early season...until then, the neoprene's are my wader of choice.
Daubs