How warm is this padded jacket? This down jacket, worn as a 3rd layer, has been certified for an active comfort temperature of -5°C , during a standardised test in a thermal chamber. The model is wearing a synthetic long-sleeved T-shirt and a light fleece underneath. It works with a simulated 5 km/h wind. We have also tested this model in static mode. The comfort temperature is +5°C in this case.