F4 Cold Premium Solid with cork on the back. -4°C/25°F and colder. Rub on performance wax, a natural step up for the F4 consumer that require the little extra. For all skis and snowboards. For all snow conditions. Economic and long lasting. No solvents. Handy pocket size. Rub on, cork in and go! Based upon Future Cera® raw materials, which grant for high quality and an environmentally friendly profile.