Under Armour Men's UA Speedform AMP Training Shoes Synthetic Imported Synthetic sole Shaft measures approximately 2.5" from arch UA AMP Technology amplifies the biomechanics of your foot's movement for precision fit, feel & proprioception Innovative UA SpeedForm technology delivers zero distraction while training External TPU heel counter for locked in support Silicone taping on the forefoot for grip& durability during training Molded toe cap