STX Internal Wind Deflectors 4pcs For BMW X5 G05 2019 OnOur STX deflectors are designed to maximize and improve comfort and protection when driving in any weather condition. The aerodynamic design of our STX wind deflectors have a series of benefits including reducing wind noise and protection from sun exposure and rain. The sleek stylish finished design will also help enhance the look of your vehicle. Prevents water entering vehicle when window is declined slightly Effective in controlling airflow