Oakley HSTN SQ Sunglasses pair a defined square silhouette with a lightweight O-Matter frame, offering clear visual performance and comfortable all-day wear. Key attributes: Matte Rootbeer | O-Matter | 100% UV protection (up to 400 nm) | Prizm lens technology for enhanced contrast and color | Impact-resistant lenses | Unobtainium nosepads for a secure non-slip fit | Injection-molded O-Matter frame for lightweight durability | Available with Prizm and polarized lens options | Square frame | Defined angular silhouette | Clean contemporary lines with metal temple details | Dimensions & fit: Lens width: 54 mm / 2.13 in | Bridge width: 21 mm / 0.83 in | Temple length: 142 mm / 5.59 in | One size (54-21) | Universal fit suitable for everyday wear | Composition & care: Frame: O-Matter | Lenses: Prizm (Oakley lens technology) | Clean lenses with a microfiber cloth; store in the protective case when not in use; avoid abrasive cleaners and exposure to high heat.