Fluorinated hydrocarbon waxes are a category 4 & have a lower percentage of low-melt point fluoro additive. Used as training waxes or as racing waxes with Cera F as a final layer or alone as a race wax at a very low temp. Blue 6: 21 F - 10 F (-6 C to -12 C). Base conditioning wax for cold snow bases.|Red 8: 34 F - 25 F (+1 C to -4 C). High performance training wax & base for optimal conditions.|Yellow 10: 50 F - 32 F (+10 C to 0 C). For very wet conditions and when snow is dirty. Also good for base preparation and to protect the bases while traveling.