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Nike Impel Swift sunglasses are so lightweight, runners forget they are wearing them. With an eight-base sport wrap frame for maximum coverage, the Impel Swift has all of the latest Nike technology to maximize stability and durability. The patented construction of the lightweight nylon frame is complimented by the hyper-light magnesium temple arms that have a waffle tread pattern for added grip to the secure-wrap arms. The nose bridge is adjustable and ventilated for a customized fit that improves airflow and reduces slippage, while the hinges have cam-action spring to snap firmly into place. The swift cut flying lens reduces fogging, and the stabilized optics feature minimizes lens movement and distortion. These sapphire blue Impel Swift sunglasses are also equipped with standard Nike Max Optics technology for distortion-free clarity in all angles of view, and have state-of-the-art UV protection for the super blue lens.