Oakley Enigma Mass OX8191 frames pair bold, architectural styling with lightweight materials for secure daily wear. The design prioritizes comfort and retention with Unobtainium nosepads and earsocks for a steady fit during active use. Key attributes: Brown | O Matter | Lightweight construction | No-slip grip | Durable frame | TruBridge Sport Unobtainium nosepads | Unobtainium earsocks for increased grip | Prescription-ready frame | C-5 tapered temples | Full-rim frame | Square silhouette | Trigger-stem inspired temples | Tapered temple design | Dimensions & fit: Lens width: 55 mm | 57 mm | Bridge: 15 mm | Temple length: 141 mm | Lens height: 43 mm (size 55) | 44 mm (size 57) | Regular fit (Universal Fit) | Composition & care: O Matter | C-5 temples | Unobtainium nosepads and earsocks | Clean lenses with a microfiber cloth and lens cleaner. Rinse frame with lukewarm water and mild soap and dry with a soft cloth. Store in a protective case when not in use.