I use the older Cabela's E.C.W.C.S. with a wicking T-shirt underneath. They have newer products now which I've not tried. Over that it's either my old wool commando sweater or fleece. Then either wool or scent lock on top.

Merino wool is nice like JW said, but cost quite a bit. If it's out of your price range like it is for me. You can get buy with an itchier version of wool by wearing a wicking material underneath.

Good luck whatever you decide.