Calvin Klein CK21523 Eyeglasses Color:001 - Black The flexible temples feature a

The flexible temples feature a distinctive ribbed grip design that helps the frames stay in place during active play

Spring hinges also extend the frame's lifespan by absorbing the stress of daily wear

What sets the 4378F apart is its transparent frame options—from crystal clear to soft brown and grey tones—that add a contemporary edge to the classic square silhouette

Built from lightweight yet durable acetate

making it a practical choice for progressive wearers who need clear zones for distance

Calvin Klein CK21523 Eyeglasses Color:001 - Black The flexible temples feature aThe Calvin Klein CK21523 eyeglasses bring clean, modern style to your everyday prescription eyewear. These men's frames feature a classic rectangle shape in full rim acetate construction, available in four versatile finishes: Brown Havana tortoise, solid Black, Blue, and Matte Black. With a 55mm lens width and 15mm bridge, they're sized for medium to larger faces and designed to balance rounded features with structured, angular lines. Acetate is the