STX Internal Wind Deflectors Dark Smoke 4PC For BMW 5 Series G30 2017+Our 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