Belstaff Flash-Methane Sunglasses pair hand-crafted Mazzucchelli acetate construction with Carl Zeiss optics for reliable 100% UV protection and refined everyday wear. Key attributes: Grey | Acetate | 100% UV protection | Carl Zeiss and Japanese lenses | 7-hinge construction | Beta titanium temples | High-grade Mazzucchelli acetate frame | Hand made in Japan | Hand-polished finish | Dimensions & fit: Lens/Bridge/Temple: 150/00/140 mm | Composition & care: Acetate (frame) | Polycarbonate (lenses) | Beta titanium (temples)