I was in need of some polarized sunglasses that are inexpensive (2 young kids so they don't last long) so I ordered these and I have been really happy with them.  The sun protection is great, they fit really well (maybe too small for men?) and they actually feel really sturdy like they will last for quite a while (if my kids don't get to them first).  My husband has the Ray-Ban version of these and when comparing the two the differences are hard to notice and I saved about $150.  I highly recommend trying these out!