The Grubber HPS Plus+ offers excellent value and exceptional color balance for HPS lighting with our proprietary Carl Zeiss Vision lenses. The lenses are made of polycarbonate with 100% UV protection and a Flash Silver outer coating. Like other premium eyewear, and unlike typical prescription lenses, these lenses are decentered (asymmetrical) to eliminate distortion that would otherwise occur with a curved lens. The Grubber frame features a rubber nose pad that keeps the frames comfortable for hours, even in hot conditions. Includes a microfiber pouch for proper cleaning and storage.