Medical equipment that is attached to the inner surface of underwear to warm the stomach and waist. The soothing heat of the steam warms the stomach and hips deeply and promotes blood circulation. Comfortable temperature of about 40 degrees lasts for 5-8 hours. Steam that is gentle on the skin. Do not get your clothes wet. Easy to use even when going out because there is no odor. Optimal design for women’s tummy and waist. Effect: Thermal effect (improves blood circulation, activates gastrointestinal function, relieves neuralgia and muscle pain) * Be sure to attach it to shorts * Do not attach it to the skin.