The frameless Madison Stealth Sunglasses offers a huge range of vision and maximum eye coverage. The sleek design works great for all types of riding and really excels on the road where the huge vented shield lens keeps heat build-up and fogging to a minimum.Madison Stealth Sunglasses FeaturesPolycarbonate 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 its 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: Madison 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: Madison has included a soft pouch for lens cleaning and protection on the move. An optional RX insert is available for prescription lensesSize Spec: Lens Width: 132mm, Lens Height: 53mm, Frame Width: 145mm, Bridge Height: 14mm, Arm Length: 118mm