There are no limits run free when you lace up a pair of these nike free run flyknit 2 running shoes in black and whitedesigned to allow more freedom these mens running shoes come with a sock like flyknit upper that combines support flexibility and breathability all in one no matter what surface youre taking on underneath the outsole both expands and contracts to allow your foot to move naturally from heel strike to toe offthese nike trainers also feature flywire technology which provid