Full coverage cloth chin curtain. Designed to fit over the existing pull down spoiler with no modification and can be removed easily for warm weather riding, allowing the spoiler to be used again. Reduces turbulent air under the chin, reducing wind noise and air or debris from swirling up into the helmet. Also helps to draw air out from the mouth area to keep humidity off the shield. Easy "4-click" mounting tabs allow it to be installed in the Corsair-X, Signet-X, Quantum-X, Defiant-X, DT-X, Contour-X, and XD-5.