Made of heat-sealed, closed-cell EVA foam.

About Therapy Balls
Use the Myo-Release Ball ™ in myofascial release exercises and movements to assist in equalizing muscle tension throughout the body. The different sized balls allow you to treat trigger points based on their size or sensitivity. The larger balls let you spread the force out over the muscle area, and the smaller balls allow you to target only a small part of the muscle and penetrate the tissue more deeply.