Oakley Field Day Optical Frame combines lightweight O-Matter construction with no-slip Unobtainium earsocks for durable, everyday eyewear. Designed for reliable fit and easy prescription compatibility. Key attributes: Black | O-Matter | Lightweight construction | Durable frame | Enhanced grip with Unobtainium earsocks | Three-Point Fit for stable lens alignment | Includes original case, cleaning cloth, certificate of authenticity and guarantee | Molded nosepads | Compatible with Oakley Authentic Prescription Lenses | Square silhouette | Rectangular lens shape | Dimensions & fit: S (115mm) | M (119mm) | L (124mm) | Youth fit | Narrow fit | High bridge fit | Composition & care: O-Matter frame | Unobtainium earsocks | Use Oakley Micro Bag or Oakley Lens Cleaning Kit to clean lenses. Otherwise rinse with mild soap and water and dry with a microfiber cloth. Store in protective case. Avoid solvents or alcohol.