Brand: KIO YAMATO Frame Shape: Half-rim (Nylor) Material: The temples (arms) are likely made of lightweight and durable materials such as beta-titanium. Features: A sharp and stylish design that frames only the upper half of the lenses. Characterized by simple lines that eliminate ornamentation. Lenses: This frame contains prescription lenses. Please consult an ophthalmologist to have lenses that match your prescription, or non-prescription lenses, installed. Thank you for viewing.