[PrG]

The best to keep yourself warm yet allow your body to breathe and perspire is Poly Pro and Gore Tex. Stay away from cotton if possible even for your underclothes. Cotton, although a great fabric has very little insulating ability especially when wet. Get poly pro or a similar type of synthetic wool. Poly pro is thin and relatively cheap, wear that directly in contact with your skin to include sock liners, glove liners, and a hat. Layer over that with a gore tex running suit. Layer in between with whatever you like but remember your body perspires more that you know. You want to keep yourself right at that point where your just comfortable. Once you start perspiring, your body oils and sweat degrade the insulating capability of whatever you're wearing. If you're out for extended periods remember to take a change of socks, underwear, t-shirt, and glove liners. Basically anything that you're wearing up and close to your skin.

PrG