[TAC Polarized Lens] -- UV400 Protection Coating blocks 100% of harmful UVA & UVB rays. Visually restores true color, eliminates reflected or scattered light. TAC polarized triacetate lenses are impact and scratch resistant, lightweight and durable [Al-Mg Metal Alloy Frame] -- ANDOILT sunglasses frame use of advanced high-quality materials ,aluminium-magnesium alloy, Its hardness is several times of other traditional plastic sunglasses, weights only 25g, but they are scratch resistant, durable and unbreakable. ideal for cycling, driving, running, fishing, racing, skiing, climbing, and all outdoor activities enthusiasts.[Risk Free After-Sale Service] -- Customers can return it to Amazon in case the purchasing is not satisfied for any reason. If you have any problem, feel free to contact us.