Firstly they are NOT individually stacked or labeled as per the description. But that's not the main thing - they are VERY low quality. How clean. they basically don't work at all. Here is a photo with glasses from this list on the left and my personal glasses on the right. There's no comparison - the ones sold here just don't give the effect they were designed for. I really wish Amazon was more concerned about weeding out junk sellers.
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