Do not buy these sunglasses. I purchased them for a trip to Hawaii, as they are on the cheaper end and I wouldnt care if I lost them. These sunglasses reflected the sun onto my nose to the point that it burned so bad it started bleeding, and I was wearing plenty of sunscreen, as no where else on my face or body burnt.
When I went and applied more sunscreen, the chemicals in it caused the black coloring from the plastic of th sunglasses, to come off and run down my face and stained my nose.