Barrie Wells wrote a review of Native Eyewear Nano2 Interchangeable Polarized Sunglasses on March 5, 2009
I don't hunt or shoot, I run, and Nano sunglasses are perfect - don't mist up when I am sweating, ensuring I have a clear view when I am up in the hills and hence minimising chances of falling and breaking something. Not that I haven't - I fell off a mountain and broke a collarbone, but not the Nanos. I did break a pair once, by dropping a washing machine on them, and they were replaced under their "unbreakable" clause, so I am confused by the posting that expressed dissatisfaction. I am now on my 4th pair, but the others were lost or stolen, not broken.