High grade down jackets generally use more than 90% white goose down or more than 90% white duck down. Real down jackets with more than 90% warmth retention and high fluffy degree make down jackets light and comfortable to wear. The down content refers to the percentage of down and down filled in this garment in all the filled feathers and down. For example, if you buy a down jacket filled with 90% white duck down and 10% white feathers, it indicates that the down content of the garment is 90%.

The most common fillers in down jackets are goose down and duck down, which can be divided into white down and gray down according to color. According to the price, the down jackets on the market are ranked as follows: white goose down>grey goose down>white duck down>grey duck down. It may be affected by the sorting of price, so many people think that the quality of these fabrics is also sorted in this way. In fact, it is not. Through theoretical research and practical experience on down, generally speaking, goose down with the same quality and content is better than duck down in terms of warmth retention and fluffy degree, but the color has little to do with the quality of down jacket.