Kaleos STIRLING C5 Sunglasses pair a glossy black acetate frame with blue photochromic lenses that adapt to changing light for consistent protection and clear vision. Designed for everyday wear, they balance refined style with practical optical performance. Key attributes: Black | Nero | Acetate | Photochromic blue lenses (react to light) | 100% UVA/UVB protection | Anti-reflective treatment for improved clarity | Integrated acetate nose pads | Lightweight acetate construction | Handmade details | Rectangular frame with slightly rounded corners | Glossy black acetate finish | Thin front and temples | Dimensions & fit: Lens width: 53 mm | Bridge: 18 mm | Temple length: 145 mm | Composition & care: Acetate frame | Photochromic lenses