This is my second pair.  I lost my first ones in the ocean.  Native makes some good sunglasses for the price, and I've used their "lifetime guarantee" on another (different) pair I owned when the lenses got deeply scratched.  You do have to pay shipping, but for roughly $20 I got a brand new pair lenses to pop in, saving me about $25 over simply buying a replacement set of lenses.  The polarization works very well--much better than a pair of Ray-Bans I had.  The Native polarization film cuts glare much better than the Ray-Bans did.  This particular style fits best on large heads.  I'm 6'5", 240lbs so they work for me.