When throwing and catching balls almost the entire body muscles are active. This medicine ball with 7 kg weight is a slam ball. This means that it does not bounce when thrown. This feature allows a number of efficient fitness exercises, at home or in the gym. Especially the speed strength can be improved with this training tool. The outer wall of the medicine ball is made of plastic and therefore extremely durable and very handy. The medicine ball, 7 kg, is filled with air and sand. For different requirements and a varied workout you get the slam balls with different weights. All are kept in discreet black.