Ray S.wrote a review of Native Eyewear Cable Interchangeable Polarized Sunglasses on May 25, 2013
If you expect a pair of $100+ glasses to be straight, you better look somewhere else. After 3 pairs, all three had the same issue. The left arm is higher than the right causing them to sit crooked on my face.
Backcountry was great working with me to send all of the replacements but couldn't check to see if they were straight before mailing the replacements out. The last conversation with a phone rep said that they could be within manufacturers tolerance. Seems Native would have a little tighter control and tolerance if they want to be a decent sunglass manufacturer.