OK, so have a Merrell Wakefield insulated, which is great. However it is only suitable for single figure temperatures. Are the non-insulated ones much, much cooler and lighter? I love the hood and styling, I need a coat that will keep me dry on a half-hour walk but that will not make me too hot. And not look too frumpy. I am a 14/16 and have an XL, it is a sensible fit but large rather than small - would I be better off with an L in the non-insulated?