A patented spray on speed additive, F65 is used primarily for Alpine and Snowboard competition because it delivers unsurpassed top speed. Use on old snow, -8C to - 15C (18F to 5F); and on new snow, -4C to - 8C (26F to 18F). Above 32F, spray on then use with butter. From 18-32F, spray on then use with hyperzoom. Colder than 18F, spray on then use with race rocket. Will cover about 10 pairs of skis.