Swix Grip Wax V40 Blue Extra

A really versatile grip wax covering a large temperature range on the cold side of freezing.  If you're using it close to 0°C, it needs relatively new snow and low air humidity (below 45-50%).

New fallen snow:  -1°C to -7°C (30°F to 19°F).
Transformed fine grained snow:  -3°C to -10°C (27°F to 14°F).