The heated 509 Sinister X6 Ignite Lens is available in a range of weather-specific tints to fine-tune the performance of your 509 Sinister X6 Ignite Goggle. Simply push a button and the lightweight, strap-mounted rechargeable lithium-ion power pack quickly heats the entire inner lens surface to 104°F. The system features two modes along with a continuous runtime rating of up to 5 hours at max temp for clear vision all day.