mens winter overcoat korean stylish down jacket daily men's warm looset green blue size l xxl 3xl 4xl high outwear, 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. there are four natural departments of thermal insulation materials, namely cotton, wool, silk and down. down jacket has the thermal insulation