The ultimate accessory for keeping your Costa sunglasses secure during all your adventures. Crafted with premium materials and designed for performance, this retainer combines style, durability, and functionality like never before. Key Features: Streamlined Silicone: Engineered with streamlined silicone, the Bowline Retainer offers a sleek and comfortable fit that won't weigh you down. Whether you're hitting the waves or exploring the trails, this retainer ensures your sunglasses stay in place without compromising on style. Flexible and Durable: Built to withstand the rigors of your active lifestyle, the Bowline Retainer boasts exceptional flexibility and durability. No matter where your adventures take you, rest assured that your sunglasses are securely fastened with this reliable accessory. Lightweight Construction: Say goodbye to bulky and uncomfortable retainers. The Costa Bowline Silicone Retainer is lightweight, ensuring maximum comfort during extended wear. You'll forget you're even wearing it, allowing you to focus on what matters most - your next adventure. Sliding Bead for Adjustable Tension: The Bowline Retainer features a sliding bead mechanism that allows you to adjust the tension according to your preference. Whether you prefer a snug fit or a more relaxed feel, you can customize the tension for a personalized experience. End-to-End Measurement: 19": Designed for convenience, the Bowline Retainer offers an end-to-end measurement of 19 inches, providing ample length for a comfortable and secure fit. Whether you're hiking, fishing, or simply lounging by the beach, the Costa Bowline Silicone Retainer is the perfect companion for your Costa sunglasses.