2021 winter down jacket men jackets hooded thick coats mens womens lovers parka winters coat, Black

down jacket is light, warm and soft. in the down jacket, if the warm keeping effect is the same as that of cotton, only a few hundred grams of down is enough to keep out the cold, while cotton needs thousands of kilograms. it can be seen that the volume of down can be fluffy several times. down products can be compressed to make them smaller, which is helpful for carrying or transportation. through scientific research institutions, it is found that down has a star like structure, each down silk presents a fish scale shape and has countless tiny pores. therefore, down has good warmth retention