What are the advantages of wearing a vest?

/kloc-you can wear a vest at 0/5 degrees. /kloc-it's cold at 0/5 degrees. You can wear a shirt inside and a vest outside. The main function of vest is to protect the front heart and back. Keeping warm and wearing a vest with jeans will be more fashionable. Young people like to dress like this. In rural areas, more people wear vests in cold weather. Therefore, it is ok to wear a vest at 15 degrees.