Welcome to my store, will provide you with quality service ?Product coefficient? Material: Stretch cloth SBR knitted cloth color: gray Size: 52.5 11.5CM Applicable people: cervical spine discomfort, stiff neck, cold spine ?Forbidden crowd? 1. Pregnant women, children and those with a tendency to brain disease and cerebral hemorrhage or bleeding frequency 2. High fever, temperature dysfunction and partial skin damage are prohibited 3. People with allergies should be used with caution. Those with electronic devices such as heart pacemakers in their bodies or metal stents in their bodies are prohibited. 4. Patients with hypertension or heart disease have adverse reactions when using it. ?Maintenance? 1. The temperature of the washing water is below 40 C, light kneading, no ironing, no oxygen bleaching 2. Do not bake at high temperature 3. The cleaning time should not be too long, you can gently wipe with clean water or a little detergent (wash within 15 minutes) 4. It is strictly forbidden to wash in water for a long time. Do not use washing powder, bleach or soap 5. Keep away from light.Portable: Durable and durable, you can easily carry it wherever you are. All activities are gentle and unobstructed throughout the day. Temperature-Locking Fabric: SBR technology temperature-locking fabric is used, with a thickness of 3MM, which isolates the cold and cold air, and locks the temperature, making the repair process faster and simpler. Removable gasket: two-effect replaceable gasket, used alternately. Self-Heating Pad: wear it for a period of time, the neck has obvious thermal sensation, which plays a role in comfort and warmth, and the duration of heat generation the fluff pad: sticks to the warmth, uses high-quality coral fleece, and the neck is warm to protect the cold neck. Magnet Maintenance: 5 energy magnets, adjust the magnetic field, anti-inflammatory and analgesic. This is very useful for relieving neck tension and pain caused by ongoing medical problems. This can reduce the number of painkillers you take. Self-Heating: At the same time of contact with the skin, energy conversion occurs under the action of oxygen and water to release heat energy. (Note: Everyone's skin is different, and the temperature is slightly different. It is recommended to wipe the surface of the heating pad with a warm water towel to speed up the heating).