Costa C-Mono Retainer

The Costa C-Mono Retainer provides a sleek, lightweight way to keep sunglasses secure and within easy reach during fishing, boating, and other outdoor activities. Constructed from high-tenacity monofilament, the retainer combines strength and durability with an ultra-lightweight feel that remains comfortable throughout the day. Its streamlined profile minimizes bulk while providing dependable eyewear retention on and off the water.

Flat, low-profile temple attachments connect cleanly to Costa sunglasses without interfering with the fit of the frames, while the integrated Costa logo bead provides a finished look. Measuring 20 inches from end to end, the C-Mono Retainer is compatible with all Costa sunglasses and provides a simple, unobtrusive option for keeping eyewear close at hand.