Roller Ice® provides targeted cold or hot therapy to relax muscles, relieve tension and ease aches and pains. The liquid filled reservoir holds its temperature when chilled or heated. The temperature is transmitted through the stainless steel massage ball or “bullet” to the treatment area. The ball rolls freely in all directions for a great massage. “Bullet” provides additional weight for deep tissue massage. Fitted neoprene “bulb” cover insulates the liquid reservoir and protects the therapist’s hand from the cold.