CORTEX 28kg Wall Ball Complete SetExplode into a high intensity workout with the Cortex Wall Ball 28kg Complete Set. Wall ball training involves highly explosive movements that target broad muscle groups and get your heart pumping. They improve your functional strength and are a great way to burn calories. A huge range of exercises use wall balls, but typically they are thrown against a wall in a way that activates the whole body. Because of their purpose, wall balls need to conform