It can release pressure and fatigue on the cervical vertebra.

This series of product can absorb odor, sweat, moisture ,emit far infrared ray ,release minus ion and warm your body ,increase the cells’ activities ,accelerate the blood circulation ,improve body environment ,so it is helpful to relax your body.

The inner core can’t be washed by water ,just solarized per month to improve activation.  

Baoheitan brand Bamboo charcoal is come from bamboo which carbonized under high temperature .There are innumerable holes crosswise in its structure  ,so bamboo charcoal has possessed great absorption effect .If processing bamboo charcoal under very high temperature(1000-1200 °C),it will emit far infrared ray ,release minus ion ,absorb electromagnetic wave. Bamboo charcoal also  possesses rich trace elements and  natural mineral, such as calcium ,potassium ,sodium and iron etc .For this  characteristic ,bamboo charcoal is widely used is our daily life and in agriculture ,medicine ,textile ,military affair ,electronics ,industry etc .