Oakley HSTN SQ Sunglasses combine a durable O-Matter frame with Prizm lens technology to deliver enhanced contrast and reliable sun protection for everyday and active use. Key attributes: Black | O-Matter | Prizm lens technology (enhanced contrast) | Polycarbonate lenses | UV protection | Square frame | Full-rim construction | Performance lifestyle styling | Dimensions & fit: Lens width: 54 mm | Universal fit | Suggested size: Large | Composition & care: O-Matter frame | Polycarbonate lenses | Wipe lenses with a microfiber cloth; store in protective case; avoid abrasive cleaners.