The Ignite heated dual lens technology by 509. Available exclusively on our Sinister X5 & Kingpin goggles, the Ignite heated lens provides the ultimate in fog prevention technology. Fueled by a lightweight strap mounted 7.4V 2200mAh rechargeable Lithium-ion power pack, the entire surface of the lens quickly heats up to 104° F using a transparent thermal conductive ITO (Indium Tin Oxide) layer on the inner lens. Evolved from military aircraft windshield defrosting technology, the Ignite quickly eliminates fog with a single button in either two minute auto mode or ‘always on’ mode. A continuous run time rating of 4-5 full hours at max temp ensures you are fog free all day.