Virtue has a great selection of Base replacement lenses. The Base goggle system is durable and cost effective. The lens replacements feature multi-layer thermal lenses, a hard coated outer lens, an anti-fog inner lens, crystal clear optics, and tool-free installation. Please note that these are not compatible with the Virtue VIO masks. If you need any lens replacements for Base goggles, let Virtue supply you with a great selection of Base lenses in a variety of colors.