
I bought 2 packs. My boyfriend and I use and love them. They're not too heavy, especially on my alloy frame - I don't even notice them. They're big enough to cover the entire lens and have a small push-down mechanism at the top, making it easy to put on and take off the glasses. The heat change is imperceptible. They are not too yellow which is what I was looking for. I do a lot of graphic design, so the colors couldn't be too different - that helped. I've been using them for a few weeks now and definitely notice less eye strain after long periods of screen time. Each pair comes in a thin plastic case, and I was given a cleaning cloth and a small pouch of extra rubber bits (the rubber won't scratch them where the clips touch your actual lenses).

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