Get a color for every condition with the 509 Sinister X6 Fuzion Flow Lens, offered in a full range of weather-specific tints. Doubling down on clarity, its industry-first Fuzion lens technology fuses Super Anti-Fog inner and outer lenses into one optically clear view, while Frogzskin® venting eliminates fog by optimizing airflow. Swapping between lens tints has never been easier with the Sinister X6's Fast Lens Loading System.