*【99% Polarization is more Resistant to Strong Light】▶ It is polarized lens with UV400 protection. The polarization rate of our sunglasses is higher,reaching 99%,far exceeding the industry standard of 78%,and it is more able to withstand the strong sunlight of the United States.They protect your eyes well and cut glare well and are perfect for summer. *【SOLID AND THICKER METAL FRAME 】▶ Metal frame,more durable and solid;Thick makes sunglasses less prone to deformation.Antioxidant plating;Passed anti-allergy & skin-friendly tested,it is harmless to skin; *【Three-dimensional Horizontal Groove Arm 】▶Flexible Spring Hinges; Fine Workmanship;Light-weighted But Durable & elastic arm gives you comfortable wearing experience and is Skin-friendly.Don't worry that the arm will easily be broken.