Belmor VL-825-1 Smoke Ventvisor Side Window Deflector for 2013-2019 Freightliner Cascadia Evolution Lets fresh air in and stale air, odors, and heat out  while keeping the elements at bay and reducing interior fogging Deflects water away from the drivers line of vision to side mirrors Helps keep the driver comfortable and alert Installs easily with 3M automotive grade tape Made in USA and backed by a Limited Lifetime Warranty