CK24100S. Frame material: Metal. Caliber: 57 mm. Lens material: CR39. UV protection: UVA / UVB. Matte Gold colourway: lens colour Solid Brown, sun filter category 3, high level of sun glare reduction and high level of UV protection. Matte Black colourway: lens colour Solid Smoke, sun filter category 3, high level of sun glare reduction and high level of UV protection. Sunglasses come with a protective carrying case. Colour: green