Dragon X1S goggles have some of the best lenses on the market. If your lens has seen some use and has gotten scratched over the years, ordering a new lens instead of buying a whole new pair of goggles is a great option. Or if you're looking to get a new lens to try out in a different light condition, this is the place. Dragon X1S lenses have a very hardened surface and can take a lot of abuse before needing to be replaced. Adding a new lens to your stash for varying light conditions is a great investment.