In very windy conditions, I wear a Marmot hardshell jacket with a zip in fleece jacket over a Marmot windshirt. It seems to eliminate windchill. In moderate cold, I wear a Columbia softshell jacket over my Marmot windshirt. In milder weather, just the windshirt is enough. The key is layering according to the conditions outside. And I don't have to worry about looking like the Michelin Man, simply because modern fabrics do a very effective job of keeping one dry and warm without excess weight or bulk.