The Madison Shields Single Lens Glasses are versatile sunglasses with a face-hugging shape that helps to protect you against wind and spray whilst out riding.Madison Shields Single Lens Glasses FeaturesPolycarbonate Lenses: Optics from Madison meets the highest standard for eyewear; ISO 12312. Lens Light Filtration Cat. 0 with suitable for Low-Light conditionsMulti-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: 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: 170mm, Lens Height: 45mm, Frame Width: 175mm, Bridge Height: 20mm, Arm Length: 130mm