The mirror effect lens has come off after just being under my zip right over the eye, unusable on day 1, avoid
I'm sorry you have had a problem with the mirror effect on your Walking 400 glasses.
The mirror effect is applied to the surface of the lens and can be liable to abrasion. I believe this to be true of most mirrored effect glasses.
The lens itself is poly-carbonate offers excellent resistance and durability.
As you are not happy with the glasses you are more than welcome to return them for an exchange or refund. Depending on the wear and tear your glasses get you could exchange like for like or go for a non-mirrored lens.
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