AerialVent™ Ventilated Polyester American Flag for Aerial Display | Made in USAEngineered for Vertical Display. Designed for Wind Relief. The AerialVent Polyester American Flag is purpose built for vertical aerial display on fire trucks, ladder trucks, cranes, and high elevation rigging systems, where standard flags are unsafe or prone to failure. Unlike traditional flags designed to fly freely, AerialVent flags are engineered to hang vertically while safely managing wind load. Strategically placed vent slits allow air to pass