It depends on the winter temperature in your area. If you wear it in Heilongjiang, Jilin, Northeast China in winter, it will definitely not work. My area is Dalian. In winter, you can wear a sweater or coat inside and a cotton-padded jacket or down jacket outside. If you are in Guangdong and Guangxi, it is definitely ok to wear a sweater, but it is definitely not possible to go to the north. Anyway, you need to wear a cotton-padded jacket outside.