Hyperice Hypersphere MiniDesigned for the on the go, the Hypersphere Mini is a compact massage therapy ball that helps to relieve tension and increase range of motion and flexibility. Three high intensity vibration settings Can be used to activate, soothe, or loosen muscles fascia in the: feet, calves, hamstrings, gluteus, hip flexors, shoulders, back, and forearms The Hypersphere's high intensity vibration allows you to release tension and targeted areas deeper than a foam