2. Scarves can be long, triangular, square and other shapes around the neck. Fabrics are generally made of wool, cotton, silk, modal, rayon, acrylic, polyester and other materials, which are usually used for warmth, beauty, cleaning or religion. In cold climate, people will wear thick scarves made of wool to keep warm. In places where the climate is dry, dusty or air pollution is serious, people can wrap a thin scarf around their heads to keep their hair clean. With the development of time, this habit has become a fashionable dress for women in many cultures. In some countries, knitted scarves and other clothing are common trade goods. Some Australian football fans also use scarves of various colors. The name of the supporting football team is printed on the scarf, and the fans will show it in the audience and wave and cheer.