Massage your sore muscles with the RumbleRoller X-Firm Beastie® Massage Ball, which has latex-free, phthalate-free construction. The tactile, high-friction surface maximizes shear forces, while the precisely engineered bump flexions and uniformly spaced bumps allow deep muscle penetration. The included detachable, multifunction base can elevate, intensify, stabilize and hold the massage ball. Made in USA. RumbleRoller Beastie X-Firm Massage Ball Green Light - Exercise Accessories at Academy Sports