Directly apply to the neck, shoulders, waist, or abdomen for warmth. Provides soothing steam heat that deeply warms the affected area, improving blood circulation and relieving shoulder and lower back pain. Comfortable temperature of approximately 40°C lasts for 5-8 hours. Gentle steam that doesn't wet clothing. Effects include: improving blood circulation, relieving muscle stiffness, reducing muscle fatigue, activating gastrointestinal function, alleviating pain from neuralgia and muscle pain, and fatigue recovery. General medical device.
