Fabricated for the demanding conditions of everything from slow, technical riding to long endurance races, the 509 Sinister MX6 Fuzion Flow Goggle has been made for the most extreme riders doing the most extreme riding. High-flow Frogzskin® venting—a super fine mesh that lets air in but keeps dust out—has been combined with our fog-free Fuzion lens technology to create an incomparable goggle to anything else around.