Take your cardio endurance to the next level with the pro form max weighted vest this can be used while doing anything from running on the treadmill to doing pull ups this will not only make your cardio better but also improve your strength and muscular endurance this will reduce your speed and endurance and make trying a lot harder with this vest on but once you take the vest off and training or perform without it you will be able to train harder and for longer key features of the pro for