Landson Tourmaline Magnetic Therapy Orthopedic Knee Support Belt (Adjustable Self Heating Knee Pads) Both sides have support of spring,can relief the pressures pening design,contains EVA round damping ring ,stable patella Selection of high quality fabrics,breathable and comfortable and radiating Our products using high-density flexible fiber textile technology,telescopic natural and comfortable,Not easily deformed.Breathable and able to endure high temperatures Contains high quality spring ,can effectively absorb and break pressures of wrist