Oakley OX8143 Chamfer Squared frames combine a squared silhouette with TruBridge fit technology for secure, all-day wear. The lightweight O Matter construction and no‑slip Unobtainium stem sleeves make them suitable for everyday optical use. Key attributes: Gray | O Matter | TruBridge technology for improved fit | Lightweight, durable frame | No-slip Unobtainium stem sleeves | Three-Point Fit for stable optical alignment | Adjustable wire-core temples | Interchangeable icons and nose pads | Compatible with prescription lenses | Includes protective case | Squared lens shape | Subtly beveled stems | Matte/satin finish | Full-rim frame | Dimensions & fit: Lens width: 54 mm | Bridge: 16 mm | Temple length: 140 mm | Lens height: 39 mm | Regular fit | High bridge fit | Composition & care: O Matter (frame) | Injected temples | Unobtainium stem sleeves | Demo lenses (replaceable) | Clean lenses with mild soap and lukewarm water and dry with a microfiber cloth. Avoid solvents or alcohol-based cleaners. Store in the protective case when not in use and avoid prolonged exposure to extreme heat.