80% Grey Duck Down
The fine down from the abdomen, neck and wings of high-quality grey ducks is carefully selected. The down has a natural reed-like fluffy structure, forming a natural warmth-keeping layer with the flaky feathers. Its core is an animal protein fiber base, and the surface of each down is densely covered with tens of thousands of tiny triangular pores, forming a dynamic breathing insulation system - the fiber relaxation degree is intelligently adjusted with the changes in body temperature, contracting to lock in the temperature when it is cold, and expanding and ventilating when it is hot, realizing all-weather circulation and heat storage. The unique hollow structure can efficiently absorb the heat energy dissipated by the human body, and build an air insulation layer to effectively block the penetration of external cold air, bringing light and imperceptible warm protection.