Speed: transforms impact absorption into propulsive energy with ultra-lightweight cushioning Energy return: transforms every heel strike into responsive, explosive forward movement Lace-up style Removable, cushioned insole allows for custom orthotics PROFLY cushioning absorbs the impact of every landing and propels every toe-off Textile and synthetic upper/textile lining/synthetic sole pre-owned good condition. normal wear to sole... pre-owned...Good Condition Size 11