Nike womens free rn 2 running shoesthese womens nike free rn 2 running shoes bring you miles of comfort with reduced layers and weight they feature a breathable circular knit upper and a tri star outsole pattern that adjusts to your foots every step delivering support and flexibility these shoes also feature dynamic fit technology achieved through flywire cables integrated with the laces for an adaptive supportive fit featuresupdated circular knit upper supports with an improved one to o