Kaleos Balin C1 sunglasses pair an architectural rectangular acetate frame with blue photochromic lenses that adapt to changing light for clear vision and UV protection. They emphasize a sculpted, three-dimensional look with robust yet ergonomic temples for comfortable wear. Key attributes: Black | Nero | Acetate | UV protection | Anti-reflective treatment | Photochromic lenses | Photochromic lenses that adapt to light | Ergonomic, stable temples | Handmade construction | Rectangular acetate frame | Double milling on front and temples for a voluminous 3D effect | Integrated acetate nose pads | Dimensions & fit: Caliber 48 mm | Bridge 28 mm | Temple 145 mm | Composition & care: Acetate frame | Photochromic lenses