Binding : Apparel Product Description The Nike Women's Air Sock Racer Ultra Flyknit pays homage to itself by draping its uppers in Flyknit - a technology that the original Sock Racer's stretchy upper was a precursor of - while the reliable microfibre straps and buckles remain from the original. Now with a re-tooled sole unit, the already featherweight shoe becomes ultra lightweight, with endless cushioning from ZOOM Air and siping along the outsole for improved flexibility 0
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