The ESS Crossbow Gasket, airflow management for your Crossbow Eyeshield. The Gasket fits snugly against the wearer's face to create a full seal to protect against wind, dust and other airborne debris. The Gasket insert is easy to install and features two modes: Closed - fully sealed and Open - ventilation mode. Optimize your efficiency by not having to change between goggles and eyeshields, insert the Gasket onto your Crossbows when you need protection from wind and airborne debris, remove it when you do not. The ESS Crossbow Gasket is compatible only with the ESS Crossbow and Crossbow Suppressor Eyeshields, sold separately.