Swix Sport FC8X Cera F Powder. Best selling FC008X powder is continued in the new line. A versatile powder which performs well in all snow conditions on both sides of the freezing point, a safe choice. The speed of the iron should be approx. 4-6 sec. on a skating or alpine ski. It's highly recommended to have a good iron when working with powders. The powder should be ironed once. Temperature range from +4C to -4C. (39F to 25F). Recommended iron temp: 165C (329F).