Crafted by Nature’s Cold-A Natural Heating System.It features 900+ fill power down clusters from flying geese – 35% loftier than standard goose down, offering exceptional thermal insulation without synthetic enhancement. 8–10 natural branches per cluster — for greater loft and lasting warmth. Ultra-fine down fibers naturally evolved to withstand extreme conditions. Exceptional Quality, Meticulously Selected. Every down cluster is naturally shed from high-flying white geese, preserving its original purity. Skilled artisans evaluate each cluster by eye and touch — selecting only those with a full core and well-formed, three-dimensional fibers. Precision Wind-Sorting-99.2% of Inferior Down Removed. Each cluster undergoes 6 rounds of screening and 2 phases of separation using a 23-meter high-capacity gravity sorter. Only down with a falling speed ≤3cm/s and a density ≤0.0008 g/cm³ is retained—ensuring exceptional lightness, loft, and quality.