Temperature range from -5°C to -10°C (23°F to 14°F). Recommended iron temp: 145°C (293°F). Our std. CH6 has been a success in the Cera Nova system, and through comprehensive testing we have not found anything better. It is an economic training and racing wax as well as a base prep wax for cold skis. CH06X has high durability and offer great performance in most snow conditions as well as on artificial and glacier snow.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.