Costa Del Mar Sunglasses - Isabela / Frame: Shiny Tortoise Lens: Polarized Silver Mirror Wave 580 Glass - Costa Del Mar Sunglasses, style Isabela is an edgy and sporty Rx-able nylon wrap frame. The Isabela is designed with corrosion-resistant stainless steel hinges, adjustable wire core temples and special materials on the saddle nose bridge and temples to ensure comfort and minimize slippage. Featured on the temples is the Costa Del Mar logo. Ultra-thin polarized lenses eliminate water/ surface glare & ensure superb optical clarity. Costa Del Mar Sunglasses scratch-resistant glare reducing lenses always provide 100% UV PROTECTION.