Temperature range from 0°C to 10°C (32°F to 50°F). Recommended iron temp: A new wax for the Cera Nova X line made harder than the old HF10BW. The BW solid lubricant additive reduces the friction in contaminated snow. The adjusted hardness makes the wax more durable and absorbs less dirt. Excellent results in artificial snow as well as natural transformed older snow, especially noticeable when used alone. The speed of the iron should be approx. 8-10 sec. on a skating or alpine ski. The wax can be re-heated after cooling to room temperature (10 min) for better durability. Important to have a good iron to get an efficient melting of the wax. HF10BWX can be used as a race wax alone, but is often used as a base for Cera F, such as FC10X and HVC Warm (FC80L)