CK20521S — Men's Sunglasses. The CK20521S from the Calvin Klein Collection presents a rectangular frame crafted from injection-molded plastic, designed for everyday urban use. Its silhouette blends style with practicality, making it a solid choice for those seeking a bold accessory for outdoor activities. Calvin Klein Collection emphasizes refined finishes and meticulous detail, placing these frames in the premium tier. Measurements are 56-15-140: 56 mm lens width, a 15 mm bridge, and 140 mm temple length. A 56 mm lens width is particularly flattering for oval, round, and heart-shaped faces. Mount: The rectangular shape yields a long, clean profile with straight lines that convey a structured, modern look. Lens material: The lenses offer UV400 protection, blocking 100% of UVA and UVB radiation. With a Category 3 sun filter rating, they’re suitable for driving and high outdoor sun exposure.