Serengeti Lupton 2.0 Sunglasses pair an ultra-light rimless frame with PhD 2.0 photochromic, polarized lenses for clear vision in changing light. Designed for driving and active use, they prioritize a secure, comfortable fit and optical performance. Key attributes: Black | Nylon | Photochromic (light-adjusting) lenses | Polarized lenses | Spectral Control® for enhanced color and contrast | Lightweight and impact-resistant | Grip-embedded temple tips for secure fit | Flexible, durable frame | Integrated hinge | Fully rimless frame | Wrap-rectangle lens shape | Reinforced temple design | Dimensions & fit: Size 64 x 18 x 130 mm | Medium-large fit | Base curve 8 | Composition & care: Nylon frame | Trivex lens (PhD 2.0) | Clean lenses with a microfiber cloth and mild lens cleaner; store in a protective case when not in use.