They are Serengeti. Prescription and with a special Blu Blocker lens. Very light weight but strong. I've bashed them about quite a bit. I got these at an opening sale of a new store and haven't been able to find them again as I want a new pair exactly the same as they are getting worn. If you ever look into it and come across a supplier please PM me as they are so good I could wear them the rest of my life!