When do you wear vest in Tianjin?

1mid-October to 1 1 mid-late month. According to the information displayed by official website, the thick vest is suitable for wearing after the middle and late months of 10 and before the middle and late months of 1 1 0. In late autumn and early winter. A vest is a collarless and sleeveless short coat. The main function is to keep the front chest and back chest warm and facilitate the activities of hands. You can wear it under your coat or under your underwear.