If you think Zurich's are expensive, you should have seen the clip-ons I have for my glasses. My glasses magnets to moun the sunglass add-ons, and the sunglasses are the same shape as my frames. I love them. Same protection as Zurich's, 2 pairs of clip-ons (one for my car and one for my flight box) $200. and that's not including the original frames and lenses. but as said before, my eyes are definately worth it!!