One thing that helps me stay warm in winter is having 3 pairs of socks and slightly oversized boots. The first pair of socks are thin liners, the second good fleece and the third are oversized polartec socks I got from LL Bean. By having the different size socks with the big boots, I get 3 layers insulation and no overconstriction of my feet. I do a lot of deep wading in 40 degree water. It helps!
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If every fisherman would pick up one piece of trash, we'd have cleaner rivers and more access.