Trimon 4 The lenses appears to be well made, polarized and UV Protection 400. The size of the lenses are a bit big but hides my glasses well, making it appear I am wearing real sun glasses. I am quite happy with the quality and the looks of this clip-on sun glasses. I would have given 5 stars if I could have folded the lenses for portability like my old clip-ons.Update: I used the clip-ons while driving and found the lens were very good in both very bright and even lower light conditions. Also used at a golf driving range. Could see much clearer with the clip-ons. Can highly recommend.