Serengeti Lupton 2.0 Sunglasses combine an ultra-light rimless frame with advanced PhD 2.0 photochromic, polarized lenses for clear vision during driving and active use. Key attributes: Matte Crystal Black | TR-90 | Photochromic PhD 2.0 lenses | Polarized lenses | Spectral control | Hydrophobic and oleophobic coatings | Anti-fog treatment | Grip-embedded temple tips | Rubber nose pads | Lightweight frame | Integrated hinge | Secure fit for active use | Rimless design | Rectangle wrap lens shape | Minimal, low-profile temples | Dimensions & fit: Lens width 67 mm; height 43 mm | Bridge 18 mm | Temple length 130 mm | Medium-large fit | Composition & care: Frame: TR-90 | Lens: Trivex (PhD 2.0) | Clean lenses with a microfiber cloth and lens cleaner; avoid abrasive cleaners and solvents; store in protective case when not in use.