Scott USA Double ACS Thermal Lens for No Sweat Xi, 80 and Recoil Xi Goggles - Red Chrome 206681-192A dual pane lens designed to separate the warm air in the goggle chamber from the chilly air outside. All THERMAL lenses feature Scotts No Fog lens coating, polycarbonate material to maintain impact resistance and provide 100% UV protection. THERMAL lenses to not include tearoff posts. A thermal lens featuring Scotts ACS offset vent holes in the lens to further decrease fogging. ACS lenses are made from polycarbonate material to maintain impact