509 just raised the snowmobile helmet game to new heights. Or shall we say to a higher ALTITUDE. Introducing the all new Altitude snowmobile helmet from 509.The Altitude helmet is the result of a fearless desire to not only create, but innovate. It is the product of looking at every feature of our previous Evolution helmet and asking the tough question, "How can we improve?". the result is a helmet designed and built from the ground up with 4 ideals in mind: Safety, Performance, Fit, & Style. The Altitude helmet excels across the board.