REVO 4 ROOST DEFLECTORThe Revo 4 Roost Deflector provides front only roost and impact protection in a lightweight, low profile, under the jersey design. The Revo 4 is Race Collar Compatible, which means it is strategically designed to fit EVS race collars and most neck braces. The Revo 4s exterior Impact Shield and plush bio foam interior liner combine to provide optimum protection against debris and collisions while providing optimal air circulation to regulate core