Nike flex fury 2 junior girls trainers the kids nike flex fury 2 trainers are perfect for everyday casual wear featuring a two tone woven upper with contrasting lace details to the sides along with the iconic nike swoosh to the sides for a simple but stylish look these nike trainers also benefit from a nike flex outsole that allows greater mobility of the foot while the insole provides a cushioned supportive fit completed with a lace up front for a secure fit kids trainers lace up