I just layer up with fleece according to conditions and type of fishing. At least one thin layer of capilene to stay feeling dry with neos. The Patagonia stuff may seem a bit hoidy toidy but darn the stuff is good and it lasts like iron too. My favorite piece though is a Simms one piece PolarTec overall suit for real cold conditions, like sitting in a float tube all day, cause the one piece keeps the heat distributed throughout the body better. But the single most important tip I've learned is that no matter what you are using, keep things loose, especially around the feet. If you wear to much stuff and things get constrictive or tight you will cut off circulation and get even colder than if you were wearing less. I now use oversize boots, sandals or fins to allow layering around the feet if necessary. Really makes a difference. I think this is another reason looser fitting breatables are better because you can layer better than neos for the conditions without the negative affects of constriction.

Oh, and if you want to give the missus a special thoughtful Xmas gift that says you care about her comfort, that you want her to stay happy and warm while she fishes with you into the sunset, get her a pair of cashmere or Quiviut socks. If that doesn't get you a guided trip with Bob for your birthday, I don't know what will.

Hang loose and be warm and dry.