Oakley Si Ballistic Det Cord sunglasses combine military-grade impact protection with a lightweight, comms-compatible frame. Designed for tactical and active use, they offer durable protection and clear optics in a single, purpose-built model. Key attributes: Black | O Matter | Ballistic-rated protection (meets MIL PRF 32432) | Surpasses ANSI Z87.1 impact standards | High-definition optics (HDO) | Available with contrast-enhancing Prizm lenses | Comms-compatible thin stem technology | Rubberized Unobtanium nosepiece | Anti-fog coating | Lightweight construction | Wraparound pillow/rectangular frame | 8.75 base lens geometry | Full-rim construction | Slim temple design | Dimensions & fit: Frame width 130 mm | Lens width 60.8 mm | Lens height 41.3 mm | Bridge width 18 mm | Temple length 135 mm | Size: M (130 mm) | Sold in one size | Composition & care: O Matter frame | Polycarbonate lenses | Unobtanium nosepiece | Rinse lenses with warm water and mild soap and dry with a microfiber cloth; store in the protective case when not in use; avoid abrasive cleaners and solvents.