Oakley HSTN RX OX8139 is a round, full-rim optical frame designed for everyday prescription use. It suits progressive and single-vision lens setups for reliable, all-day wear. Key attributes: Gray | Transparent | Nylon | Progressive lens compatible | Prescription lens compatible | Full rim | Includes original case | Round frame | Dimensions & fit: Lens width: 50 mm | Bridge width: 21 mm | Temple length: 140 mm | Lens height: 46.2 mm | Medium fit (50-21-140) | Composition & care: Nylon | Wipe lenses with a microfiber cloth; avoid abrasive cleaners and excessive heat.