The weather forecast says what level the travel index is and what level the dressing index is. Is level one or level nine better?

The clothing index is based on meteorological conditions such as sky conditions, temperature, humidity and wind that have the most significant impact on human body temperature. It classifies clothing suitable for people to wear to remind people to wear appropriate clothing according to weather changes. Dress attire. Generally speaking, the lower the temperature and the higher the wind speed, the higher the dressing index level. The clothing weather index is divided into 8 levels. The smaller the index, the thinner the clothing.