Temperature range from 0°C to 10°C. Recommended iron temp.: 120°C. CH10X is made slightly harder than the old CH10. Test results show that a harder wax performs better in very wet saturated snow. The adjusted hardness makes CH10X more durable than before. A good wax for base prep and training. For racing we recommend to go with fluoro wax in this temperature area. 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.