Reusable freely combination of massage balls for providing releasing aches, pains and tensions in back, arms and legs; promoting circulation and a free flow of oxygen, which ultimately benefits your sense of well-being; Heat with hot water and cold in freezer. It can help stretch and relieve sore and tired body. This reusable massage ball is an up-grade of classic one. It’s great for pre-exercise, warming up the muscles prior to activity and accelerate blood circulation. The two massager balls’ combination: one is studded for acupuncture alternative; another one is deep tissue massage. They are excellent tools for yoga, exercise and so on.