Calvin Klein Classic Round Sunglasses combine a slim acetate frame with 51 mm round lenses for everyday sun protection and a minimalist profile. Key attributes: Black | Acetate | UVA/UVB protection | Category 3 sun filter | High glare reduction | Adjustable temples with pin hinge | Prescription-ready (RXable) frame | Includes protective case | Round shape | Slim profile | Calvin Klein logo at temples | Dimensions & fit: 51 mm lens width | Composition & care: Acetate | CR39 lens | Clean lenses with a microfiber cloth; store in the protective case.