Over the holidays, Dan at the Columbia Sportswear Company sent along one of Columbia’s latest products for mom field testing in Vermont’s Northeast Kingdom, where the weather is said to at times rival that of Siberia. The product: A Women’s Reach the Peak Down Jacket–a sleek jacket (“grill” hue) featuring Columbia’s new Omni-Heat Thermal Reflective Technology. When I pulled the jacket out of the box, I was immediately skeptical that such a thin and lightweight jacket, lined with what looks like shiny, albeit silky soft, aluminum foil could keep a busy, active mom warm enough in cold weather, let alone sub-zero temps.  As much as I love Vermont and snowy…