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sunglasses are not only a symbol of fashion trends, but also a must to protect the health of the eyes learn from the "biological wax" principle of the leaf anti-fouling coating - the lens surface layer uses a low-tension coating to reduce pollution adsorption wear-resistant hinge integrated fixed mode hinge, smooth opening and closing, longer life. the lens contains a discoloration factor, which will change color rapidly under ultraviolet irradiation. when the sunlight discoloration is strong, the lens color will deepen and absorb ultraviolet light. when there is no sunlight, the lens color will return to its original color. the simple line composition expresses the fashion charm of the big frame and the new wind is and different.syi