Akoni Copernico Optical Frame pairs a sculpted Japanese acetate front with adjustable Japanese titanium temples for a refined round silhouette. Ideal for everyday prescription wear, it emphasizes comfort and precise fit. Key attributes: Navy | Silver | Acetate | Lightweight construction | Clear CR-39 lenses | Adjustable Japanese titanium temples | Ceramic nose pads with beta-titanium arms | Threaded tube screw system | Round frame | Sculpted acetate front | Internal titanium double rim | Dimensions & fit: Lens width: 45 mm | Bridge width: 23 mm | Temple length: 152 mm | Weight: 37.4 g | Standard sizing (45/23-152) | Composition & care: Japanese acetate | Titanium | Beta-titanium | Ceramic | CR-39 lenses | Clean lenses with a microfiber cloth and lens cleaner; avoid abrasive cleaners and high heat. Store in a protective case when not in use.