ESS ICE 2pt4 Eyeshield/Profile NVG Goggle High Impact Nylon Black Frame RX Lens Inserts. After the lenses have been corrected by an optometrist ESS Rx Lens Carrier snap into either ESS Profile NVG Goggle and/or ESS ICE Eyeshield nosepiece for a low profile lightweight prescription integration as a goggle accessories. This allows one low-profile lightweight rx adapter insert goggle Goggles Prescription Integration to work in two products Specifications for ESS P-2B Blank Rx Lens Insert 740-0311: Manufacturer: ESS Gender: Unisex Photochromic: No Polarized: No Features of ESS Prescription Inserts: Work in two products: ESS ICE Eyeshield/ESS Profile NVG Goggles High-impact construction exceeds the impact requirements of MIL-STD-662F and MIL-PRF-31013 Rx lenses can be cut using conventional edging machines Package Contents: ESS Rx Insert Corrective Vision System for ICE Eyeshield and Profile NVG Goggle Storage Case Goggle and Spectacle Adapters 740-0311: ESS P-2 Rx Insert range of corrections to +/- 11 material plastic black