AQUA-Energy Healthy Shoulder Pad provides the heat and warm to help a good blood circulation and reduces the injuries. The temperature increasing is a reaction of water molecule and special nano material. This reaction will bring a resonance with F.I.R (Far Infrared Ray) under normal skin temperature. Those are all physical changes without any electric power. * Shoulder strain/ sprain * Weak shoulder * Arthritis * Rotator cuff tendinitis * Bursitis * Shoulder instability