Nines Optics Delta Sunglasses utilize top-of-the-line technologies and a cool, light, and comfortable design. Delta sunglasses offer anglers a great, quality, stylish pair of sunglasses at a reasonable price. NIRTECH Polarized and NIR lenses are effective at blocking harmful rays. Each pair of Delta Sunglasses has anti-glare, anti-reflective, and hydrophobic coatings to help keep your lenses clean and give you the clearest vision possible. Built using a TR-90 thermoplastic material in the frame, Nines Delta Sunglasses are flexible, lightweight, and durable.