FEATURES: The Costa C-Line retainer features ultrathin, lightweight coated wire with logo bead to make sure your sunglasses stay put, on and off the water. From end-to-end, the Costa C-Line Retainer measures 20". The Costa C-Line Adjustable Retainer is compatible with all Costa sunglasses and fits small to large temple tips. VISIT THE COSTA BRAND SHOP: Click on the Costa logo above to view the entire Costa sunglasses and accessories assortment.