Demist Shield Infrared Receiver Lens AN/PVS-14 The PVS-14 Demist Shield snaps onto the eye piece of theunit to prevent condensation from forming on the optics during rapidtemperature changes, heavy and/or long use. This low cost lens is cheapinsurance to keep your PVS-14 operational. We recommend this accessoryfor anyone operating in constantly humid or maritime environments as well asthose in desert locations where the temperature can change dramatically betweendusk and dawn. This Item is ITAR controlled and cannot be shipped or carried outside theUnited States without express written permission from the United StatesDepartment of State. We do not export outside the United States. PERIOD!