Operation & Adjustment Can be adjusted at three different positions for cabin air flow control when full windshield is installed: Weather Protection & Airflow 1) Outside deflection to reduce cabin air flow and turbulence. 2) Inside deflection to increase air flow in the cabin. 3) Windshield ventilation to reduce fog. Materials & Construction Clear polycarbonate air deflectors mount on each side of the cage. Installation & Compatibility Compatible with all windshields. Not compatible with full doors. Included Sold in pairs.