1, different colors: grey duck down is gray, and white duck down is white.

2. Different prices: The price of white duck down is more expensive than that of grey duck down.

3. Different uses: white duck down is used as the filler for light-colored fabrics, and grey duck down will be selected as the down jacket for dark-colored fabrics.

4. Different yields: the yield of white duck down is less, but that of grey duck down is more.

advantages and disadvantages

1, duck down is very fluffy, and a lot of air is preserved in the middle to prevent heat loss caused by air flow. At the same time, the thermal conductivity of duck down itself is very poor, which prevents the heat loss caused by thermal conduction. Therefore, the warm-keeping performance of duck down is very good.

2, because ducks have two kinds of hair, the outer layer is the outer feather, and the surface layer has a layer of oil to prevent the feathers inside the duck from being wet by water when it is launched, and it also has a protective effect. The inside is called duck down, which mainly plays the role of heat preservation. They are thin, dense and light, which makes it difficult for cold air to enter, so the body temperature will naturally not be lost, so it is very warm.