Power Systems Myo-Release Ball for Myofascial Release Therapy Ball keeps its shape for myofascial release therapy Can be used to treat specific trigger points or to spread force over a large muscle area Does not absorb moisture or bacteria and can be used for multiple clients Heat-sealed, solid, closed-cell EVA foam construction Massage therapy training and recovery aid for speed, agility, strength, power, running, football, volleyball, basketball, baseball, soccer and all other athletic, fitness, weight, or cross training