1, warm. The reason why light down jackets keep warm is because the materials are different. The characteristics of down jackets are light and warm. The down liner is completely blown by the wind and almost warm. You can only keep warm under your coat.

2. Velvet. Lightweight down jacket has no anti-leakage function. The down liner is lined with a layer of cloth as the main fabric, which has a good function of filling down and preventing down leakage. Therefore, light down jackets and down jackets are not good, and each has its own advantages and disadvantages.