Siberia is one of the coldest regions on the earth. Usually, the icy winter lasts for six months (-40℃ to -60℃), which allows geese to grow out abundant plumages to protect them from the extreme weather. While summer in Siberia lasts for four months (20℃ to 35℃), creating a good condition for goslings to grow. Huge underpopulated areas in Siberia allow geese to grow in natural surroundings with few human control influences. Geese and ducks raised in Siberia have a long breeding period. Therefore, Siberian down usually has massive mature down clusters, higher fill power, and excellent insulation ability, which ranks top level in the global down and feather industry.