Maui Jim use patented PolarizedPlus2 technology, and here is the explanation of what that is direct from their website:
PolarizedPlus®2: In every pair of Maui Jims you’ll find our patented, color-infused lens technology that wipes out 99.9% of glare, 100% of harmful UV and boosts color via specially designed lens treatments. So your view is clearer, with crisper contrast and amazing brilliance.
We are very excited to announce that we have become Brand Ambassadors for Maui Jim. The seriously cool part of this news is that we now also have Maui Jim premium polarised sunglasses for our clients to use!