I have been using these driving glasses for several months. Brown lenses reduce glare as well as gray lenses, but I think brown lenses provide better contrast between objects, which helps when driving. For this reason, I think they're better suited for twilight and dawn riding when it's still light outside but some glare control is needed when the sun is low on the horizon. I've also used them while driving in bright sunny snow with no problem. They are easy to put on without removing the glasses and the clip keeps them secure without scratching the lenses. The clip is just in the corner of my field of vision and doesn't distract me, even though it may seem strange to some. This is a very good alternative to paying $130 for magnetic attachments or buying prescription sunglasses. The photos show how they look on my glasses and I've included a photo of the yellow lenses so you can see how they match my glasses.
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