I am going to buy sunglasses. Here is how and where I am going to use them:
- mountain trekking - with altitude mostly below 2000, however I will use them in the following months on higher mountains (Kilimanjaro, Mont Blanc)
- summer and winter (all year but I think due to sun reflection snow it's an important criterion)
- high quality product that I could use for years
- some other factors, which I may not be aware of at the moment, that would important in the mountains (like visibility)
I am not an expert in this field. What should I pay attention to (filters, materials, etc.)?