Lens Type: Solid (non-gradient)Frame Material: Metal (ruthenium/gunmetal finish), high-quality acetate or a similar material for the templesLens Material: High-quality polycarbonate or glass (typical for Cartier, offering UV protection).UV Protection: 100% UV400 protection (standard for premium sunglasses).To ensure longevity, clean lenses with a provided cleaning cloth and store in the protective case when not inuse. Avoid harsh chemicals and extreme temperatures.