Bosideng-Jie Bing Ailieral, Yalu, Duck, Duck Baby YBB, these brands of down jackets are well-known down jacket brands in the market at present. If you buy a brand, you will keep warm when you wear it. If you wear a miscellaneous brand, you can only keep warm once, and the quality is very poor, so I must buy a good one, and I will buy one for myself every year. I usually wear Bosideng-Jiebinglun down jacket.