Deliver gentle, controlled tension release to hard-working muscles in the back, shoulders, glutes and feet with this versatile kit. Two Therapy Balls (1 textured, 1 smooth) - are filled with a unique compound that enables them to safely retain either heat or cold, giving you one easy-to-use tool with a variety of highly effective pain relief applications. You control the temperature, motion and level of pressure for fully customizable therapy. Color: Orange.