The Optic Nerve Fusebox sunglass offers a smaller, high-performance rimless silhouette that works great for active women and smaller to medium face shapes. An adjustable beryllium copper bridge rest makes custom fitting a breeze. TR90 frame resin offers durability and comfort. The vented lenses are de-centered polycarbonate material for shatter-resistant performance and precision optical clarity. The Fusebox comes with a hard case and four sets of interchangeable lenses.