Best Seller. Myo-Release Balls provide a solid, lightweight, and uncrushable tool for performing myofascial release techniques. Available in two different sizes, our therapy balls can be used to treat specific trigger points or to spread force over a large muscle area. Because they keep their shape and do not absorb moisture or bacteria, these myofascial release training tools can be used by multiple clients, making them equally useful in a gym as they are in the home. Heat-sealed, closed-cell EVA foam. Blue or Black. 6" or 8" diam.