Replacement lens kit for the FutureTech. Each kit comes with 1 replacement lens - everything you need to give your shades a refresh. Replacement is easy, just grip it and rip it. To replace just lock it back into the frame. Ensure your brow window is even within the frame and you're ready for warp speed. Lens is marked Z87+ - End users must exercise extreme care when installing to ensure compliance with the Z87 standard.