Costa C-Line Retainer

The Costa C-Line Retainer provides a lightweight, low-profile way to keep sunglasses secure and within easy reach during fishing, boating, and everyday outdoor activities. Constructed from ultra-thin coated wire, the retainer offers a streamlined design that minimizes bulk while providing dependable eyewear retention. Flat, low-profile temple attachments connect securely to Costa sunglasses without interfering with comfort, making the C-Line a practical accessory for active days on and off the water.

The C-Line is available in standard and adjustable configurations to accommodate different preferences. The standard version measures 20 inches from end to end, while the adjustable version features sliding Costa logo beads that allow the length to be adjusted from approximately 10.75 to 17 inches. Both designs maintain a sleek, lightweight profile while helping prevent sunglasses from being misplaced or lost during outdoor activities.