Smith Optics Airflow Series keeps your vision fog-free! The special air intakes on the Smith Airflow Goggle series keep the fresh air flowing. The lens technology of the Smith Air Flow Ski Goggles features vents in the brow of the lens that increase the circulation of fresh air to keep the inner goggle lens dry and fog-free. A semi-porous foam filter is positioned behind the Smith Airflow Series vents to prevent snow and moisture from infiltrating the goggle chamber. Smith Optics gives you a clear view with a lineup of ski goggles that are ready to meet any condition on the ski slopes.