RADIUM PRIME SIGMA (and EXTRA LENS)Effortless style, deliberately overachieving, designed to thrill. These technologically advanced goggles make you stand out in performance and style. The oversized, color amplifying SIGMA lens with Anti Fog maximizes your field of vision and keeps fog away, while the magnetic lens changing system makes it easy to switch between the two lenses and quickly adapt your goggles to the days conditions.