Temperature:Air -2°C to -8°C (28°F to 18°F). HS7 performs great in normal winter conditions below the freezing point. Its hardness makes it convenient to work with and easy to get a good end-result. Can be used as a racing wax at low air humidity, but will also serve the purpose as a brilliant training wax. The speed of the iron should be approx. 8-10 sec. on a skating ski 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. HS7 can be used as race wax alone or as a base for top coats. Recommended iron temp: 140°C (284°F).