Fly Racing Youth Focus/Zone / Zone Pro Anti-Fog Lens (FIRE MIRROR/SMOKE) Fly Racing began as a manufacturer of motorcycle handlebars and helmets. Since then, the brand has quickly developed into one of the fastest growing powersports apparel brands in the market. Replacement anti-fog (ATF) lens for Fly Youth Focus, Youth Zone and Youth Zone Pro goggles. All replacement lenses come with tear-off posts.