The perfect combination of polarized sunglasses and bifocal readers, the Tuna Alley comes from the C-Mates collection by Costa. The full-rim frames are made from bio-based nylon, an eco-friendly plant-based resin that’s lightweight, durable, and holds its shape in extreme conditions. The integral hinges are durable. Temple tips are curved inward with added grip on the interior for a secure fit. The patented vented system in these bold frames allows cooling airflow to reduce fogging. Adorned with the Costa C at the temple, these Tuna Alley bifocal glasses make a sporty option for the active wearer.