You cannot actually see anything clearly.

I bought these to use in a special toning machine at my gym. These work fine if you plan on keeping your eyes shut, but if you need to read anything, like the controls on the machine (kind of important), you are out of luck. So for me they are a bit of a safety issue. Everything is distorted and blurry. I think they are sturdy enough, you may end up replacing the elastic band which is not a big deal.

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