Evan goose down jacket is made of high quality goose down, with down content of 90%. This kind of goose down with high down content has good warm keeping performance. The down jacket is also designed with four layers of anti-drilling wool, which effectively prevents wool from penetrating and falling off. It also adopts the sterilization process of odor purification and the fabric of exothermic splash-proof technology to keep clothes dry and hygienic. Evan's down jacket also adopts photothermal technology, which can absorb sunlight and convert it into infrared heat energy to improve the warmth retention effect. The above information comes from Evan official website and the product manual.