The special photochromic lens lighten up to category 2 under adverse light conditions and darken again to category 3 when exposed to the sun. A special manufacturing method ensures that the glasses have enough buoyancy to float in both fresh and saltwater, even under turbulent conditions. The high frame provides additional protection and prevents unwanted glare and reflections. Also protects against wind and spray. The polarising lenses and the field of view of the glasses provide an excellent visual range.