MIZUNO BREAK SHOT 2 AC BLUE BLACK HAVE AN INSOLE THAT IS REMOVABLE SO YOU CAN PLAY WITH THE CUSHIONING AND COMFORT YOU WANT TO NOTICE. THE SOLE IS MADE OF CARBON RUBBER WHICH MAKES IT A MORE DURABLE SHOE BECAUSE IT WEARS LESS BECAUSE IT RESISTS ABRASIONS ON IMPACT BETTER. ALSO IN THE HEEL AREA ALLOWS MORE TRACTION ON THE FLOOR OF THE COURT.