"Swix V40 Blue Extra The most popular V-wax. A very flexible and versatile wax covering a large temperature range on the cold side of freezing. To be utilized close to zero degrees celcius, demands relatively new snow and lower air humidity. 19F to 30F"
Blue Extra is a wax that is always in my back pocket when I'm out on the trails. It kicks like a mule in Minnesota's standard winter temp range. My favorite ski saying says it all... "Blue Extra or skate!"