Kaleos Proctor C4 Sunglasses blend a technical aesthetic with adaptive lenses for clear vision in changing light. The Proctor C4 pairs a milled acetate frame with curved temples for a secure, ergonomic fit. Key attributes: Black | Nero | Acetate | Photochromic blue lenses | 100% UV protection | Anti-reflective treatment | Adaptive tinting for changing light | Ergonomic fit | Curved temples | Solid acetate frame | Rectangular silhouette | Milled detailing across the front (upper and lower) | Thick acetate front with refined finishing | Dimensions & fit: Lens width: 55 mm | Bridge width: 22 mm | Temple length: 145 mm | Ergonomic fit | Composition & care: Mazzucchelli acetate