I just use those charcoal activated foot warmers in the toe of each of my boots. I figure if your feet are toasty it keeps the rest of your comfortable. Just my feet get cold...but not anymore thanks to these. Tomster, I wouldn't layer up too much if I was doing any walking. Unlike sitting down, when you're moving you produce more heat. And if you have too many layers on you'll sweat. And if you sweat, when you finally stop you'll get chilled. So the rule of thumb is, dress moderately light if you're going to be walking, but bring along an extra sweater or sweat shirt plus a dry t-hirt that you can put on when you're done walking and plan on taking a stand.