NIKE Free Trainer 3.0 Mens Cross Training Shoes 630856-300 Night Factor 7.5 M US Synthetic Rubber sole Straps anchored under the foot that connect to the laces allow for a customized fit TPU mesh upper simulates the toughness of metal for extreme durability and ventilation Dynamic Fit technology wraps the midfoot for a glove-like feet Phylon midsole for lightweight cushioning