This is my 3rd pair from IALUKU. Again, what can i say? THE PRODCUT IS AWESOME!!!. No need to mentioned again, they always have nice quality prodcuts. Try to spend money on some other name brand just for one lense and see how much will cost you, NO need, they provide 4 differnt exchangable lenses to fit your fahsion urge. Again a testing strip for everyone of their product make sure you can truely see it before you put it into the really test. Always excellent!!!!