Belstaff Sidney Sunglasses combine a lightweight titanium frame with handcrafted Japanese acetate details and premium Carl Zeiss lenses for reliable sun protection and refined style. Key attributes: Grey | Titanium and acetate | 100% UV protection | Carl Zeiss and Japanese lenses | 7-hinge construction | Beta titanium components | Round frame | Hand made in Japan | Hand polished finish | High-grade Mazzucchelli acetate detailing | Dimensions & fit: Lens: 51 mm | Bridge: 21 mm | Temple: 145 mm | Composition & care: Titanium (including beta titanium) | Mazzucchelli acetate | Japanese acetate | Carl Zeiss lenses