Better for casual wear
I think these are great shades, for their purpose. I have tried to bike, run and climb in these glasses and climbing was the only endeavor that I was able to truly keep them on my face without having to push them up my nose constantly. These have no rubber on them to keep the eyewear in place. They are very large frames, which is good for my 7 1/2 melon, but if you have a small face or head then do not get these. Unless you want to look like Elton John.
I still have to give them a great rating though, because they are a great casual pair of sunglasses.