Waterbeds are designed using the principle of buoyancy of water creates. Medical experts say water bed in full compliance with human physiological curve anyway transform sleeping position, is truly a mattress with the body's snug, cervical spine, lumbar spine is no longer vacant, support the body weight evenly, reducing body weight pressure on the spine, muscles, tiny blood vessels and the nervous system, effectively constituted microcirculation of healthy water mattress conforming to international standards, and the spine plays a special role.