On rainy days, how much will goose down be heavier than when the weather is good?

Half a catty. When the weather is wet, the smell of goose down will get heavier, and when the weather is good, it will weigh more than half a catty. Goose down is mostly used to keep warm after stuffing things, such as goose down quilt and goose down jacket. Among all kinds of warm-keeping materials, it is undeniable that down is the best because of its soft structure and minimal wrinkles, but the quality of down is very uneven. Only high-quality down has these advantages. After strict cleaning, disinfection and selection, the finished products are produced, ensuring that their down products have stronger thermal insulation and good moisture resistance than others.