M.A.S.K. (an acronym for "Mobile Armored Strike Kommand") is a special task force led by Matt Trakker, who operate transforming armored vehicles in their ongoing battle against the terrorist organization V.E.N.O.M. (an acronym for Vicious Evil Network of Mayhem) with an emphasis on superpowered helmets (called "masks") worn by the characters of both factions.
The original toy line was by Kenner and originally released in 1985.