What temperature is velvet suitable for wearing?

Derong is suitable for wearing in the temperature range of * * below zero 10 degrees to above zero 10 degrees * *. It is a patented fiber developed by Bayer company in Germany, and it is called "diamond wool" or "cashmere substitute" by the industry. Delong has a good warm-keeping effect, which can prevent wind and cold, and the inner layer locks the body temperature, so even when going out in cold winter, Germans wear neat, capable and warm clothes, relying on it. Nike, New Balance and other big brands also use it in the warm layer of outdoor sportswear to cope with the cold environment of sleeping at the top of the mountain at night.