Silver Yupoo MOOSE KNUCKLES has always been recognized as the warmest down jacket. Various Instagram celebrities have also worn it for street photos, but they still can't get rid of their love. No matter how cold the days are, there is no need to worry because it is filled with 90 white duck down. The legendary warmest down jacket is known as a must-have for arctic outdoor sports. It is the most popular down jacket in the world. Major celebrities are rushing to buy the must-have women's model in sizes XS to XL.