ESS ICE Replacement Lens - Smoke Gray Polycarbonate lenses are made from premium-grade resin These lenses are not compatible with the smaller ICE NARO eyeshield. Interchangeable 2.4mm Smoke Gray high-impact Polycarbonate lenses Important Note for U.S. Military Customers: Only Clear and Smoke Gray lenses are approved for use in the U.S. Military. Includes Gift Box