Note: we apologize for the Limp Bizkit reference. *shudder*
8 Base Curvature - The base curvature corresponds to the curve of the lens. The higher the number, the higher the curve. 6 base styles have a “flatter” look. 8-9 base curves hug closer to the face.
Polycarbonate Lens - Polycarbonate is a tough, shatter-resistant material. Light, comfortable and much more impact resistant than glass lenses.