The ESS P-2B Rx Lens Insert features a durable nylon frame. The end result is a lightweight, low-profile prescription integration that is compatible with numerous ESS ballistic eyeshield and goggles. After the lenses have been corrected by an optometrist, the P-2B Rx Lens Insert snaps into any of the following ESS products: ESS Crossbow Eyeshield, ESS Crosshair Eyeshield, ESS Suppressor Eyeshield, ESS ICE Eyeshield, ESS ICE NARO Eyeshield, ESS Profile Series Goggles, ESS TurboFan Goggles, ESS FirePro-1971 Goggles, ESS FirePro-1977 Goggles. The P-2B Rx Lens Insert accommodates a range of corrections to +/- 11.