The classically styled cipher frame offers an excellent field of vision and superb eye protection. Half frame design is lightweight and optimised for guaranteed performance on any terrainFeatures: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 protectionmulti-purpose: both versatile and stylish, madison optics maintain their good looks on the road or trailstr-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 bendingsecure 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 desiredsoft pouch: we have included a soft pouch for lens cleaning and protection on the move. An optional rx insert is available for prescription lensessize spec: lens width: 129mm, lens height: 56mm, frame width: 141mm, bridge height: 13mm, arm length: 127mmlimited 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