TAC POLARIZED LENS: TAC lens includes 7 layers, maximum UV 400 protection, blocks harmful UVA & UVB. Perfect choice for outdoor sports and activities such as cycling, driving, shopping, travelling, hiking, and is suitable as high fashion accessory and daily wear all year round. It is also gift packaged ready, making it a wonderful yet practical gift idea for friends and family. STRONG & LIGHTWEIGHT: Aluminum megnesuim alloy make frame Strong and light, combined with great FLEXIBLE & DURABLE: Flex hinges with a small spring offer a 30 degree flexible zone for movement to provides the ultimate in performance and comfort, impact, scratch resistant and durable. And fit your head shapes, could be ideal mens sunglasses and women sunglasses. STYLISH WARDROBE ESSENTIALS: Add a modern touch to a time-honored classic. 100% MONEY BACK GUARANTEE: We are promise OUR SUNGLASSES HAVE 12 MONTHS GUARANTEE, besides, We are committed to providing our customers total satisfaction. If for any reason you are not satisfied with your purchase, please don\'t hesitate to contact us and let us know.