The identification method of true and false down jacket is totouch, and the soft one is filled down cotton and silk cotton, the featherswitha little stalk and grain are feathers, while the one with obvious grain sense is biological down. Compared with down cotton, the warmth preservation of biological down is better, but the one with lower down is still much worse.
The price of down jackets is very high for clothes made of bio-down. Why does a true down have tiny stalks when it feels fine? That's because duck down is a combination of down flowers and fly silk, and the silk stalk is obvious to the touch.
Anothermethodis to press. Generally, down with good volume and has a certain resilience. When to buy down jacket, you can use the hand gently press down jacket, see if it may be a quick rebound, if recovery soon, illustrate the quality of the feather and volume is good, and the more air can be fix, the warmer it is.