I bought two pairs of Mitsuko, because the corresponding ones I bought last year (for 11 euros please), may be fake-plastic, but they did their job for the money. I wore them at the beach. Of course, they are not for a 2nd summer, because they have opened too much. So I said this year to buy them again.
It sounds unbelievable and yet true: this year's ones have much worse construction quality than last year's. Chinese and very bad Chinese at that.