XM Fitness - Strength and Conditioning XM FITNESS 16lbs Wall Ball SKU: 5898XM FITNESS WALL BALL ALWAYS EVOLVING The XM Fitness Wall ball is the most durable wall ball on the market. At its core there is a rubber grind and iron shot mix and surrounded by compressed cotton ensuring weight balance accuracy while enclosed with a nylon net. What makes the XM Wall Ball unique is the Anti Slip PVC Material protecting everything inside with superior stitching while providing the user with excellent grip and a custom crocodile skin