These wall balls represent the evolution of strength and conditioning medicine ball training. At 14? in diameter, the COREFX Wall Balls are composed of ultra-strong PVC panels reinforced with advanced stitching at every seam and a unique texture for enhanced grip. The Wall Ball is a great fitness training tool for high-intensity interval training (HIIT), boot camp training and any training where you are looking to build a strong core and increase power and explosiveness. Includes carry strap.