The lining material actively equalizes extreme temperatures and provides an individual comfort climate at every temperature. It has even been tested in space.
This highly advanced fabric containing millions of microcapsules which react to temperature differences by altering their condition from solid to liquid and vice-versa, as required. The material in the microcapsules has been set to a particular temperature range so, when your body (or the outside) temperature rises, the excess warmth is stored. When the temperature drops, the previously-stored warmth is released. This works to create a balanced temperature, ensuring you remain perfectly comfortable at all times.