Spectacle FrameThe front is acetate: a compound of natural materials, mostly cotton, which feels nice and cool against skin. The lenses, whether clear or sunglasses, are optical quality, and absorb UV. They are made from a highly developed plastic compound the standard these days, rather than glass (hence these aren't "glasses"). The frame comes in a leather case, made by a small family run leather workroom in east London. The case is made with thick veg tan leather