I have had a pair of Costa Del Mar's Euro Frames for two years now. I have the glass lenses with a green mirror/amber or copper tint. I love then. Can't give enough praise to them. I fish mostly inshore in the summer and they make a world of difference in visibility (sun or clouds) I know some are against glass lenses fly fishing, but I find them a must. If I am relying on them to protect me from a clouser, then I should turn around and fish with the back cast. The lenses have been through everything and not been marked. I dropped them on rocks and such without a problem...even tossed them in my bag with no case and sand everywhere. Just a little rinse and their clean. The frames give a great amount of coverage and don't let much side light in. I highly recommend them.