Medicine Ball is expertly manufactured with thick synthetic leather material for resiliency. The solid material offer better for split tear and cracks. Medicine ball is a great way to improve overall strength, explosive power and speed. The durable construction material of this medicine ball perfectly assists you during cleans, crunches.The stitching expertise make this an extremely durable leather ball. The close knitted needlework ensure that the ball will not lose its shape even after rigors of use. 8 panel design makes it easy to grip the ball in general, and makes the ball perfect for rotational exercises.The interior filling is solid with natural and synthetic fibers. This makes our gym ball a very efficient tool for performing rotational and swinging type movements that focus on working the core area during training sessions. There is some filling of sand inside the ball, which makes it evenly weighted. Go for squat and reach, med ball pushups, between knees crunch, sit-ups, and one arm pushups knowing you have a comfortable hold.