The large, modern-styled Enigma sunglasses offer a huge field of vision and protection. They feature an adjustable nose piece and temple tips for a tailored fit that stays securely in place during any activity. The polycarbonate lenses meet ISO 12312 standards, are impact and scratch-resistant, and provide supreme optical clarity with UV-A and UV-B protection. The TR-90 frames are lightweight, flexible, and durable, designed to return to their original shape. These sunglasses work seamlessly with helmets due to non-slip rubber tips. The flexible nose-piece allows for a perfect fit and can be adjusted for extra venting. This model includes a photochromic lens that adjusts from clear to dark based on light conditions, offering variable Cat 1-3 light filtration and protecting your eyes from harmful UV rays while maximizing your view. A soft pouch for lens cleaning and protection is included, and an optional RX insert is available for prescription lenses. Size specifications: Lens Width: 129mm, Lens Height: 49mm, Frame Width: 141mm, Bridge Height: 13mm, Arm Length: 127mm. Madison offers a Limited Lifetime Warranty on this product.