The York 4kg (8.8lbs) medicine ball is perfect for those who have a weak core or want rock hard abs. It is made from a rubber compound material for enhanced durability and features a 2-tone design. The ball is great for improving core strength, agility and co-ordination. It offers a textured surface ensuring a firm, anti-slip grip and provides reduced bounce element. In addition, it is easy to clean and ideal for exercises such as rock and roll ups, reverse swings, step jumps, circle squats and medicine ball push-ups.