The SunCloud Aviator Sunglasses feature a timeless Aviator style with metal frame construction and spring hinges for a customized fit. Polarized lenses protect your eyes against UV rays and create a crisp visual experience. Wire frames crafted from optical grade Metal Alloys for a quality fit and lasting durability. Spring hinge at the temple for a comfortable, custom fit. Suncloud polarized lenses use advanced technology to selectively filter horizontally reflected, visually interfering light waves known as 'glare,' resulting in superior visual clarity, definition, color transmissions and optical comfort. Lenses are manufactured using injection-molded optical grade Polycarbonate material to ensure exceptional clarity and create a lightweight lens with high impact resistance for added protection. Integrated filters in the lenses provide 100% protection from the sun's harmful UVA/B/C rays. Microfiber storage bag (included) doubles as a cleaning cloth to wipe any smudges off your lenses. Lifetime Warranty. SunCloud Aviator Sunglasses