Modern looks and clever tech combine to offer a neat eyewear package. The two piece lens is sleek, giving a great field of vision and a true sports package. The clever twist lock lens is a genius system that allows for quick lens removal and installation, ideal when living in an area with variable weather conditionsFeatures: Polycarbonate Lenses: Optics from Madison meets the highest standard for eyewear; ISO 12312. The interchangeable polycarbonate lenses are both impact and scratch-resistant. The lenses offer both supreme optical clarity and UV-A and UV-B protection, Multi-Purpose: Both versatile and stylish, Madison Optics maintain their good looks on the road or trails, TR-90 Frames: TR-90 plastics are lightweight, flexible and durable. TR-90 plastic memory allows them to flex and return to their original shape without breaking or bending, Secure Fit: Our frames work seamlessly with your helmet with non-slip rubber tips for maximum comfort and security. The flexible nose-piece allows you to dial in the perfect fit, adjusting for extra venting if desired, Soft Pouch: We have included a soft pouch for lens cleaning and protection on the move. An optional RX insert is available for prescription lenses, Size Spec: Lens Width: 59mm, Lens Height: 40mm, Frame Width: 146mm, Bridge Height: 14mm, Arm Length: 120mm, Limited Lifetime Warranty: At Madison, we pride ourselves on offering an excellent product with aftercare to match. That's why this product is covered by our Limited Lifetime Warranty.